I've not read all the posts on here but...................
I've always clapped. Clapped to a record - sometimes in the wrong place , clapped at the end of a record to demonstrate my appreciation for a good tune, and clapped DJ's after delivering a decent set.
I'll always fooking clap if I want to - I don't care what anybody else thinks!
Those that are against clapping have obviously had a little problem down their pants at some point and have been left scarred!