There have been hundreds of threads on Mudcat over the years that started off in a similar way to Charley's, relating to something that happened in a pub, or a festival, or folk club, etc. But few have produced such smug, bordering on arrogant, immature (IMHO) and disparaging responses as seen on this thread. I'm in principle against censorship, but I have to admit I wasn't sorry to see this thread closed. Sure, it was calming down towards the end, but that was only after the contribution of more level-headed posters who saw what was going on and commented on it.
Maybe I took the comments a bit too seriously, but I've been happily playing in all kinds of sessions for years and was depressed at the mind-set of some of the posters on this thread (and this includes those involved in organising sessions/festivals). But on the positive side, it did show me the kind of person I never want to get involved with at festivals or sessions.