^^
I don't have to act, that's absolutely AWFUL. Halfway through all I can think about is how off the clapping is which takes me even further out of the moment. Holy crap that is horrible. If I paid good money to go see a show WTF am I paying to go see/hear? Apparently, not the actual BAND, so why don't we all just gather around a campfire with 80,000 people and sing the songs ourselves? The band doesn't even need to show up. Total garbage.
I don't know, but if these are the things you really fret over before going to see shows then maybe you ought to just stay in with the studio albums. Going to concerts isn't about you. It's about you, and the band, and all the other fans, all getting together sharing something awesome. If someone else clapping takes you "out of the moment" then I'd say you're just not getting what the moment is all about, because you've got this idea in your head that the band is giving YOU ALONE a show, and you feel like everyone else should shut-up and enjoy it the same way you would.
Sorry if this sounds sardonic, but seriously? Dream Theater's last three DVDs have featured audiences that were relatively stationary. Plus, Dream Theater have eleven great studio albums you can listen to for that ultra-personal experience you seem to be craving. Are you really going to be that upset if DT release one DVD where the crowd is a bit louder than usual? Would you rather DT release a "Live from the Studio" type thing instead?
Dream Theater are in the middle of filming what could possibly be their biggest, best, highest-budget concert ever, and it's going to be extra-long because it'll be filmed over two nights, and we've been told there's gonna be all sorts of really cool bonuses. And some people here are practically freaking out, because they're filming it in South America where audiences are intense and like to sing and clap their hands. Sorry, but to that all I have to say on this discussion is "Never Enough"