Err! Isn't this a pub! A pint and a bit of lively discussion seems appropriate to me.
I don't have any problem at all with differing views but as long as it doesn't turn into a slanging match, the online equivalent equivalent of fisticuffs, i'm fine. Personal insults are certainly to be avoided.
My posting rate is slowing down and I am fairly picky at what I read but I haven't seen any serious problems.