Already did. Anyway, this is just a silly bait. The whole reason there is faction imbalance is because Alliance run away, and hide. Alliance are the ones that are creating faction imbalance.
Also, if Horde does go to a currently Alliance dominated server, they may find themselves in a Horde dominated server a lot sooner than they would otherwise expect, since apparently, the Alliance moves away from what then became Horde dominated servers are reversible.