at least two blatantly obvious troll threads over night. Yes in this instance it seems pretty obvious that they're trolls (in fact I'm not uncertain that they're not the same poster) But they are from people whose attitudes towards children appear to be so vile as to stir up a lot of harsh and deserved responses, as well as a lot of cries of troll, which are apparently not allowed on mn... 
but if mn were quicker to respond to reports these posters wouldn't still be there and people wouldn't feel the need to A, take the piss, B, call troll, and your site wouldn't look like a playground for trolls after the hours of darkness.