Mike B. made the comment he got booted from a heroic group for wearing all PVP gear.
(sorry Mike didn't know it was you! :o jk)
But it was not the gear exactly; but fear that you were part of an annoying trend that has been going on since the DF system started.
A toon will get to max lvl thru BG's then que for heroic in epic PVP gear having never done the reg instance or even reading up on it.:eek:
In WOTLK this was annoying but the person could be carried ; In Cata things are much more serious and it is often better to kick them b4 they cause a wipefest.
What Blizz should do instead of " discovering" dungeons you should have to do them on reg mode first to unlock heroic mode.
That way ppl would have at least some idea what the boss does and thier role in the party.:cool: