Which dungeons did you notice this in? When did you first see it happening? While its unlikely that someone is doing it on purpose to take down the server, its hard to prevent from happening. Maybe you (or others) can send me a PM if you see it. We can try to figure out who's doing it, and why. Maybe they dont know its an issue, maybe they do. Best thing we can do is try and prevent it. If you see someone doing it in game, try for screen shots, or send me a PM. I will try to help out.
Cheers,
- WR69