I think EN World, in trying to have the best of both worlds (a place for players of either edition), is always going to have an uncomfortable air of conflict. It's a delicate balance. I don't envy the moderators!
I do think that the anti-4E crowd, in general, could do a much better job of not threadcrapping, based on what I've seen over the past couple of months. In a 4E forum, I think pro-4E sentiments, even if not supported or defended, should be allowed and encouraged and I think the anti-4E posters should tread a little more carefully so as to not ruin other people's fun.
I also think that once the game is out there will be less of a problem -- particularly if Russ re-arranges and adds some forums (a 4E section with a rules subforum, for example).