We don't engage in lock battles on Fingal. Many of the clans will intergroup together or ask for each others help if low number in the members clan is on.Whoever wins the lock gets the boss. It doesn't matter if people are waiting around or have already started the boss. If you win the lock over them than its your boss
Edit: these are rules on iOS server crom and majority of other iOS servers i believe
The server is drama free for which I'm grateful.
If I go to a boss and there is a member of another clan there, I'll ask if their clan is coming. If they are, then I will leave unless I'm asked to help.