I found this interesting. I was recently, on my own blog, the recipient of name calling, insults, and sarcasm, and this wasn't even a debate.
The last time it happened I was chided by a blogger I thought liked me. I've even been told to just let it slide...it was my understanding that it's against the JU TOS to verbally attack someone. Yet nothing happened.
I think that's why we see this "poo flinging", because no stop is put to it even when it's against the TOS.
I agree, it lowers the credibiltiy of the person that's swearing, name-calling, and being belligerent. I have to say it sure is a way to get points though.