Holing up in a room, until you have only one passage/corridor/door left and shoot every Zed that comes through it?
No zed will trash the welded doors when every1 stays in place, imagine that for 10 waves long. It's awfully boring.
Why do people like this?
KF is a fantastic game. I think I have well over 1,300 hours into it including the beta. The barricading into a single room for the entire game is boring. But if the team or I doesn't play that way, it is an absolute blast.