I think jingle may be on to something there. Just sayin'...
I think I'd probably call the cops on him and report to the store manager that there was some clown outside harassing and threatening the store's customers, and that I wouldn't shop there again until they did something about it.
LOL, I think "threatening" is a far cry from reminding people that the corrals are there for a reason. If I was the store manager, I'd be out there harassing them myself. 
I think I'd probably call the cops on him and report to the store manager that there was some clown outside harassing and threatening the store's customers, and that I wouldn't shop there again until they did something about it.
Id imagine that's exactly what happened, then the guy could move onto the next town and start over.
I doubt it. He didn't do anything remotely serious enough to call the police. If I was the manager and someone came in to complain about some guy like that in the parking lot, I'd tell them to put their cart in the goddamn corral. 
You'd be out of business pretty fucking quick. No matter what you think of people not putting their trolleys back, if you were the manager of the store, you would tell the guy harassing people to piss off and put it back for them, apologize and hope they come back.
Uh no. The worst that would happen is probably disciplinary action from the owner of the store if it actually escalated to that, which I already stated is not very likely if you bothered to read my post. I also posted that if people are being harassed, it's most likely by other customers rather than some random guy scouting the lot with a video camera. Your point seems rather moot.
If I was the manager and someone came in to complain about some guy like that in the parking lot, I'd tell them to put their cart in the goddamn corral. 
And that's all well and good, but most store managers would not do that, for several reasons. And as has already been mentioned in the thread (and keeps getting ignored), most store managers don't care whether or not customers put carts in the corral and don't see it as an issue. Most of them do see it as a problem if their customers (rightly or wrongly) feel threatened by rude people and talk about taking their business elsewhere.
And the bottom line is, there's just no good reason to be rude to people.
Well, I was sort of joking if you didn't catch it because there's no way I would ever be a grocery store manager in the first place. 
However, I disagree with your theory. That really isn't the bottom line. There's a lot more to it than people's feelings supposedly being hurt or threatened somehow because someone calls them out (or points something out). You're right about one thing. Most store managers probably wouldn't do that because they are too politically correct to care and just don't have the time anyway.
My take is this, which has been mentioned previously in this thread (and keeps getting ignored). 1). It isn't rude to remind people that the corrals are there for a reason. If they don't like being reminded and it is a source of tension or embarrassment for them, I don't give a shit and don't think anyone else does either. 2). The company pays to have the corrals built as a central collection point so their employees aren't wandering around the parking lot all day collecting stray carts (I've mentioned this before). That costs the company even more money, hence the reason for the corrals. 3). The cost of product increases as a result of corrals not being properly utilized. 4). Increased prices in the store is what causes people to take their business elsewhere. Not some random guy approaching customers in the parking lot. How often does that happen anyway?
Hell, it's probably mostly other customers doing the harassing. You know, the ones who actually return carts to their rightful place? All of these things have been mentioned over and over. So, where does the "people's feelings getting hurt" part come in? Nobody cares about that. It's not about being "rude". It's about people being called out on their bullshit.
If grocery store management wanted to pay their employees to walk around the parking lot all day collecting carts, why spend the extra money providing corrals? This is all very simple business strategy and is designed to benefit everyone involved. People not returning carts is what I would consider to be rude and thoughtless. People who just can't seem to be bothered with taking an extra minute or two (tops) to contribute to the cause. To do their part so to speak. After all, the carts are provided to customers as a service and convenience. The least they could do is return the favor (cart).
That's the thing, who says it's bullshit? It's not a law, it's just one's opinion.
A lot of people think it's selfish, thoughtless and lazy ass bullshit. Yes, it is just an opinion. Nobody ever said it was a law. 
You are saying you would tell your customer complaining about the dude harrassing them that they should put their trolley back then. Great way to lose a customer. What I'm saying is, run a business and see if this is your attitude towards your paying clients. You do whatever the customer wants to get repeat business. Whatever you think or your view is, running a business you want customers, plain and simple and you would do what you need to do to keep them happy.
Also, I know no one said it's a law, but you are calling it bullshit, but that's just your opinion. I was stressing just that, it's your opinion that it's bullshit when someone else thinks nothing of it. I was saying it's not a law to stress it's just an opinion.
To the "anti-corral" people:
If you come out of the grocery store, and after putting the grocery bags in your car, you put the cart in the X area. Perhaps from wind, not level pavement, you thought it was stopped but wasn't....whatever the reason.....your cart moves and damages someone else's car or property.
What would you do? Would you accept responsibility? Or would you say, "eh, not my problem".
I would hope that all of you would accept your legal and moral responsibility and pay for the damages.
For starters, "legal responsibility" doesn't get determined in a parking lot. Moreover, when I leave my cart "on the X," I don't let go of it until I'm confident it's not going to move. If it starts to move while I'm still there, I'll stop it. If the great god Cartzalcoatl chooses to send my cart into spontaneous motion after I've left, there's nothing I can do about it. Most importantly, how heavy are the carts where you live and how fast do they move that they pose any risk of significant damage? The worst that's gonna happen is a minor scratch. Also, maybe y'all shop at stores on the sides of mountains such that level parking lots are a big issue, but it sure isn't where I live.
Boom! This.