Corralling carts is certainly the courteous thing to do, but Bosk's overriding point is correct. It's nothing to get pissed off about. If it bangs into your car, then yeah, that's annoying, but frankly I blame the lackey the store pays to corral them. Insofar as them taking up parking spaces goes, American's are too God damned hardassed about parking spaces. Quite frankly, 80% of the people in this country would be well served to park a little further away, anyway. Rather than blowing a gasket because you have to get out of your car to remove a cart so you can park four spaces closer, just move onto the next one.
If we're going to bitch and moan about parking lot decency, that's my gripe. People who sit and block the only lane for a few minutes waiting for somebody to vacate a spot. I usually take the FIFO approach and park in the outskirts. I'm in the store before the lazy, fat fucks that hunt around for the closest possible parking space.
And while we're on the subject of inconsiderate assholes in parking lots, A FUCKING SUBURBAN IS NOT A COMPACT CAR! Just because your car will fit between the stripes doesn't mean it's cool to park there. A casual dining establishment that I frequent has half the lot designated for compact cars only, and half the time I can barely get in and out of my car because ginormous land cruisers taking up every square inch of the spaces next to me.