crossfaction rp with x-fire

i got an idea to let two of the opposite faction talk with eachother without having someone make and pay a second account.
to do that you will a program called X-fire, an ingame chat program.with that a horde could send his mesages to the ally he is talking with but only when both have X-fire and have eachother in their friendlist.

X-fire can be downloaded at http://www.xfire.com/download/ my nickname at X-fire is "kapitein1"

Any addon that makes possible the cross faction communication is illegal and blizz may ban you for using it. As far as I know...

It is not an addon. It is a chat program like msn messenger.

I can play at my brothers horde account atm
So I can make some crossfaction RP if I lvl my horde a bit