I cant come up with a number but I can think of many times. The ones that really stand out are viodstar when we killed the entire team, they are all stuck up behind the door and we cant click because of dots. I agree its either noobs who should have been purging or just really bad luck that we didnt have a purge there but either way we should have got that door. Bottom line, you should actually have to be somewhere to defend it imo.