I think that we can't control that without moderating the board, but I'm hoping that people will eventually respect one another more if they are allowed to say mostly anything. Not because they must but because they can.
A good example, IMO, is that Lit and I are on better terms than we used to, in spite of all the things that have happened in the past. We've cleared the air and while he doesn't approve of my views any more than before (and vice versa) we haven't had the need to jump on each other's throats lately.
I think this happened because we can do it, not because we must.