I don't care who uses what. Cosmetic or otherwise. I will say that using a damage meter in normal dungeons, which at this point with everyone overgeared are not that difficult, is a bit much and unnecessary. I have no idea if that's actually happening, but if it is, I would agree that's dumb. I still wouldn't call for a ban, though. I just think it's dumb.

However, if you are playing savage/ex or ultimate, I honestly think you SHOULD be using meters because that kind of content requires optimal play out of everyone engaging in it. And since I don't play that kind of content, third party tools don't affect me. So, knock yourself out!