Some boards are safer than others. However, I've been personally attacked for numerous opinions there...for example, I was called names over stating that I didn't think it was appropriate to sit on the floor in a public bathroom. There was a large contingency of members who seemed to think it is unreasonable to consider that to be unsanitary.
While that's one example, I found that those type of things happened quite regularly...and there seem to be people there who will get their buddies to jump in whenever it happens, so it quickly gets out of hand.
I found the Budget board to be safest...followed by the families board. The other boards I rarely posted on. The community board is deadly. I'm firmly convinced that it is nothing but a bridge for the board trolls to hide under.
If I were a regular WDW visitor I probably wouldn't use those boards either.
One thing I learned there was to quickly confront those who post only to stir the pot. I know some folks on the DLR don't like that, but I've found that pot stirrers take things as far as they can. If you call them on it quickly and openly, they usually go away. Allowed to carry on, they almost take over certain types of threads, making them dangerous for everyone!