N O!
Edit: I would explode, cry, rage, and die of a heartattack
I got pissed off just by Faction change, or the fact that you could even have horde and alliance on the same server, that you would be able to logg a "horde toon and write to alliance". So angry.... (Yeah its a game, but they will ruin it in my eyes if they allow faction group/speaking). Then WoW is no more, for me. (first time in 8years(?dunno since vanilla!) i have thought "Il quit if they do this!")
...... I... has.. pwoblem