I don't quite get it why shouldn't it be allowed whenever this is allowed in retail too? If we are doing it, why can't you do it? I don't see the issue.. However you can't compare multiboxing with alt tabbing because alt tabbing isn't near multiboxing. i don't think you understand the meaning of multiboxing and alt tabbing, because before you could use multibox and it was removed for a reason people abusing it in bgs, world pvp and stuff like that, however if you see anyone "USING" multibox feel free to report them to the forums as game masters say. It's funny that you guys cry about having multiple characters whenever you guys have 10 rogues, 20 druids, 20 hunters. If DKs and shamans are the issue just do them same not that hard, nowdays they don't even cost that much lol.
The thing that you guys trying to get away from multiple characters is insane, because that's literally what each of you do.