I agree with tall people standing in front of me (or any other shorter person) in GA and people pretending they're just passing through or going to stand with a friend or just push themselves right in front of you when they're like a foot taller than you. Also, I despise rushing the stage and crowd surfing! I had a really really bad experience a few months ago with that and had a major anxiety attack in the middle of the crowd which was one of the scariest moments of my life.

I also hate when people just stand there and makeout and clearly aren't there to see the performance. That happened at a concert I went to earlier this year. During slower songs when everyone was sitting this one couple (looked to be in their 40s) just stood there groping/staring at each other and making out. A ton of us couldn't see the lead singer at all and we couldn't move because we were in seats so basically we just had to stare at this rude couple half the night. One person finally yelled something to them then security came over and yelled at that person

I've never heard of it being weird or wrong or anything like that to wear an artist's shirt to their concert I've done it plenty of times and the majority of concert goers I see do it a lot too. I almost always buy shirts at every show, but I don't usually put them on while I'm there...I take them home to wash first.