Well, our customer relationship manager is level 80 and is Horde!
Sadly not the same server as the AAISP (alliance) guild, else we could gang up on him and have a battle... It is almost tempting to move some characters to the same realm as him!
Restricting battles to the virtual world is probably a good idea though, though casting some of the spells my mage has on them in real life could be entertaining (polymorph penguin perhaps).
We'd have to get a few more decent players in the guild though before we could have a proper battle.