And, even in the UK, I've seen school groups that are as well-behaved as you can reasonably expect a bunch of kids to be and I've seen groups making a lot of noise and running around with their teachers (or whoever) vainly trying to maintain some semblance of control.

You do realize that the original Shakespeare and similar time period plays were MUCH more like how the kids did it, right? Plays in that century were bawdy, vicious, and just nuts. And to be fair, Shakespeare's own material talks about stuff, if modernized, would be considered rated 'R'.

Sitting quietly to watch a show is pretty recent. Even classical performances were louder with praise and en-core requests shouted out loud.

I'm not exactly sure when the 'sit down, shut up, and listen' happened, but yeah.

My company has a tech convention every year. Last time I went I played spot the tech person - most people there failed the test (they were former engineers now in management trying to pretend they were still technical). I'm a staff engineer and I was the lowest position person I saw there - not even senior engineers much less the low or mid level engineers that would benefit from talking to the seniors at a tech conference.

I think tech aficionados and media types do. Tech conventions are more consumer-friendly than the scientific equivalent.