Multi Faction - Multi Boxing

Warmanes policy on multiboxing is (to my understanding) that it is allowed, however- i cannot find any articles detailing whether or not multi-faction multi-boxing is allowed. I am not sure if I am even using the correct terminology, however, I will provide an example so that you may understand what exactly I am confused about being allowed or not allowed. There is a Horde mage and Alliance rogue that are clearly the same person. They camp at onslaught harbor and one farms, when a horde member shows up- the alliance returns from afk and kills- leaving the suddenly AFK mage unscathed. Furthermore, when an alliance shows up the rogue, despite being present- goes afk and ignores the mage who promptly kills the newly arrived alliance. This is clearly one player playing multiple factions at the same time in order to control an area of the map for gold farming. I am unsure whether or not this type of gameplay is allowed, and if it is I strongly believe that guidelines need to be implemented to stop it.

Since pretty much everything you can do PvP wise is allowed here (every measure of griefing, multiboxing, etc), I imagine this is allowed too. The best way here is to go with a friend and beat him directly; I'll check the place with my character too; do you remember his name?