Hello,
I followed the ongoing debate about how to deal with uncooperative users with some astonishment. Some people seem to forget the first rule of online-communities: Don't feed the trolls!
Precisely, it depends largely on each one's personal attitude how to deal with jerks.
First, try to discuss only once. If your adversary does not answer in a way you regard as serious, is insulting or refuses to substantiate claims with arguments, immediately stop discussion - forever or until you see somewhere else that he has changed his attitude. Don't try to educate people except you specially like to do this. Don't feel responsible for a jerk's metal health!
Second, take your time. Let him have his way, put the article on your watchlist and silently revert the changes two weeks later without further discussion. Time is on the side of the regulars, not the jerks.
Third, just an idea: to feel not so alone, you could put up a page [[Wikipedia:Annoying users]] where you could state your feelings. If enough votes come up on one person, this person could _ eventually_ be banned.
Just my experiences from the German wikipedia where we had almost no edit wars at all up to now. We have questionable contributions, some are silently moved to talk pages, some are rewritten. Discussion is tried once, after this fails the person is simply ignored.
just my two cents, elian