Beentryin,
This has only happened a couple of times and if you check you'll see that the OP was a brand new member who came here with one purpose in mind. He didn't introduce himself or offer any positive input to the forum. His goal was obviously to bash a dealer. Had this same information come from an established respected member it would have been viewed in a different light.
We monitor all new posts and members. One such event, maybe one that you're thinking of was a competitor of the dealer he was bashing. He registered as a new user and only an IP search revealed who the basher really was. His posts were removed.
Yes, we do allow negative comments regarding dealers but we do not allow obvious attempts to attack by members who display no other input to the forum.
I hope this answers your question and satisfies your concern.
Tom