In reply to krikoman:
Agreed with that! But I think it's also because UKC is moderated, albeit with a light touch. It's counterpart, SuperTopo, is barely moderated at all and can become quite "heated". Although it is still more civilized than many sites, suggesting that indeed climbers are a better class of people
A book I'm reading at the moment "The Circle" posits a world where everything is known and shared (yeah, sounds like hell!) and everyone is, in principle, fully accountable for everything they do. I can't decide whether I like the book as such, but it's an intriguing enough concept that I want to see where the author goes with it.