It's a concert, everyone. What do you expect?
Of course people will get crazy and high.
You guys should be thankful at least there are RELAs who helped to control the crowd so that you guys are able to see better.
I can't see him too clearly myself too but I do not blame those in front for standing/squatting on the chair because, it's a concert! It's where people get high and crazy! It's where people scream and shout like they never did. You can't blame them. Concerts are like that. By the way, I did my part to stand on chair when people in front did. Why didn't you guys do it too? Shouldn't end up complaining after the concert, you know? You guys paid for it too and you should grab the chance. You can never control the crowd, so I suggest in the upcoming concert you guys are going, grab your chances of seeing your idol performing on stage, not to stand there and stare at the audience butts when they stand on the chair and then come back home to complain because you can't see.
Humans are selfish. Enough said.

By the way, I did not post this to offend anyone. It is just my opinion. Sorry if I offended anyone.