if i'm still a human, i shoot the pipes/whatever out after warning in admin chat. if they continue to try an cade it, the one doing most of the shooting would get 5 min time out. they normally learn at that point.
the spot is fine if you're just using it as a holdout spot. easily broken with more than 4 people in there, so long as noblock is NOT on. an with less than 4, the opening is too wide to hold and the distance to it is far too short for a group to survive.
fairly challenging spot, (and fun) if they don't cade it