Well. I've been one to do it for a VERY long time now. Finding how text translates to the opposite faction.. IE typing "d a p ee a bb b fff d jj ss" in common translates to "Y O U lo o se e ver y ti me" or "You loose every time" in the horde common language..
But.. the other day.. when I was bored and unable to play, i was surfing the wow website, read up on the ToU and noticed this -> ToU 5.B.10 states that -> "Communicate directly with players who are playing characters aligned with the opposite faction (e.g. Horde communicating with Alliance or vice versa)" Is directly against the ToU. IE... You can NOT type the text I have given you above to a /say or /yell channel, anything the opposite faction can easily read. I was uncertain about the meaning, so I submitted a petition to make sure about it.
If you are reported for doing this, you will be issued a warning (first), temp ban (second) perm ban (third) -- straight from the GM's mouth.
So, those of you who like taunting the opposite faction like this.. be aware. It >is< something they look out for, and they will ban for it.