I went with #3 for this one. You can go ahead and have your phone out all you want and I couldn't care, but it would be nice if people with their phones can be a little considerate and read the atmosphere around to see if everyone's having a good time. If I'm in GA, I always turn my back to the person behind me and I ask them if they can see well and if they don't, I can position myself accordingly. Interestingly, they always that they can see well so it's not an issue.
I think in all of the concerts I've been to, I only had one issue in a show relating to cell phones. All of the other shows I've been to, I did not have an issue with people having their cell phones out and they are filming stuff, even in the shows I was in GA for. I mentioned this a couple of times, but since this is a topic that that is very relevant I can say it again. So, at the DT show at the Wiltern a couple of weeks back, I was having issues with my view where I was seating. Since I was in the very far back and the section wasn't tiered seating, if there was a tall person a couple of rows ahead of me, I was going to have an issue with my view.
During the intermission, I had this idea to go ahead and move from Section 4 of the Wiltern Theater to Section 5 which is the absolutely far back in the Floor area where Section 5 is slightly higher than Section 4, thus I have a better view of the stage. It worked and I can finally start enjoying the DT show with how I intended to and can enjoy watching them play SFAM in its entirety. About 30 minutes in, there was this guy in Section 4 and he decided, since he couldn't see with all the tall people in front, to stand on his chair which blocked my center view of the stage. I wouldn't have any issues if he wanted to enjoy the show better, but he was just filming on his phone and not reacting to anything (no applauding, no positive aura, nothing that indicates that he's enjoying the show. He was just filming). That lasted for mainly the latter half of the SFAM set. Even the guy next to me showed me a text that stated "Sorry, that you picked the one position where the guy was standing on his chair." and all I can do is shrug.
So note to self when wanting to see DT again, I need to make sure that I can get a seat in a tiered section so I can avoid this issue, or hope they do all GA in the floor section and I can position myself accordingly if there are taller people near the front. Other than this incident, nope, cell phones has never affected my mood in the concerts other than the DT show I went to. You can do whatever you want with the phone, but a little courtesy around the people near you never hurts (which it feels like people may lack nowadays. Don't know why).