Its not funny or clever and just comes across as nasty and ignorant. But there is alot of it on MN (especially AIBU), often with a deeply self-satisfied and self-congratulatory tone! You don't find it on other forums, not even the Daily Mail (so despised by MN, ironically, or is that just sneering again!).
Is it a very British thing I wonder? Or just dull, goady people in general?
This obviously does not apply to the amusing, droll, arch, self-deprecating, wry or witty humour that does occasionally find its way on to MN. Though should add I don't visit AIBU much these days as the good stuff is rare and you have to plough through so much junk.