The restriction for not being able to send tells when someone is in a dungeon is idiotic. Not that I play a large number of MMOs, but this has to be the first I've ever seen this horrible restriction.

If you want to block tells in dungeons so you can "concentrate," it should be optional, though your ability to concentrate in the first place comes under question if you need to do this in order to concentrate, but I digress.

The reasons I've heard in game so far for not allowing tells or whispers while in a dungeon are arbitrary and asinine. Anyone with half a brain knows how to regulate themselves as to when and when not to use tells in dungeon.

I can't speak for everyone, but for many of us, sending tells does not degrade our abilities to perform in a dungeon. Granted I am new to the game, I can at least infer that this restriction does no good for anyone.