Thats my situation for the last year and a half.Keyclone + 2 accounts with different Registration Names(Mine and my ex-girlfriend) and different Contact Details.Both accounts are paid by the same credit card.

They KNOW im doing this but they basically dont care at all.So I try to stay out of trouble 'cos that day they could start caring.

Maybe the trick is I dont use identhical characters nor the same class(I have leveled undead lock + belf priest / belf paladin + orc warrior / dwarf hunter + draenei mage) so maybe I have never been reported(never talked to a GM).

If the setup is 5 undeads mages youre pretty fucked up Im afraid.