I think he is talking about online 8 player skirmish mod, not mmo. So if you have to go there it is just same as any other rts game ... you may leave yourself there and pray that noeone gona kill you meanwhile or you just quit/go out =loose/give up, nothing special really. And later when you have again time you join new one.
Picture made by Aametherar the orc
Glory to the elves!