so if you go to <members < supermoderator there is a list of all the mods inc. this guy called "mastermod" so yeah who the hell is he and i am not a stalker just so you know -.-...........
This was discussed previously, and I came with a good answer:
Probably Ucoz requested some kind of moderating in the forum to make it avaible or something, so that user was created for it. Maybe it's a default user of the Ucoz forum template.