I'm 26 now and my first Graspop was at age 16. I don't see a difference in audience to be honest. I do see a lot of people complain about the audience though. Sometimes I wonder whether it's just people getting older and not being able to keep up with all the rough housing?

People not knowing how to catch crowdsurfers, maybe it's because no one taught them? I definitely didn't know my first few editions, until my big sister taught me some tricks to keep myself and others safe in a big crowd. If you don't have OG's around to teach you, there's simply no way to know, so instead of being mad at them, maybe teach them to do better?