Using arguments like "ps3 has no piracy" or "who would pay 4000 for a game" to try to belittle any ps3 owner should be considered a bannable offence. These people have spent their hard earned money to buy a console, the last thing they want is for people to try and discourage them. All PS3 expense related smart assery should be considered bannable.
in fact i feel that using hardware issues as an excuse to belittle 360 owners, or discourage potential 360 owners in a jokingly or a trollish manner should be a ban-on-sight offense as well.