if i remember correctly zero exact rule was if camping delays the game then admins have to right to do what they feel need to keep the game at a contant pace....... so for me usually after about a 30 sec to a min pass with less players and some begins to camping and waiting for long periods making it hard to find each other I would take action.

course everyone knows how people yell camper if the other guy shot them while standing still. Its always been a judgement call long as the gamie is staying a a constant pace and not dragging out the time camping is fine and accepted