Blizzard has effectively broken the follow function in BGs (and instances from what i could gather) basically making multiboxing near impossible now. While alot of you will point to the botting problem and say this will stop it I would like you to know that most, if not all(?), the widespread botting programs have not used following as a function for a long time now.
Basically this is a huge slight at multiboxers and somewhat surprising given Blizzard's previous stance.