No real weight for the system I think. Theres a lot less people though, so if I see the same guy like 5 times in a row with -8 comments, I'm more inclined to think that person is a prick because thats how humans are built.
Its not going to stop them posting or push them to the bottom by default or anything though.
If I'm wrong ill have a pint and a wank, thats how sure I am.