Whats up is you only leave your base if you have a nuke and generally hide up in high ground / in the core area. The core wasn't 10 and 9 it was 95 and 64 and red had more momentum at the time.
Siege teams don't need people constantly defending thats what super protectors are for and mines are for... when the super protector goes off you know somebodys there. You not only sit and wait for people to kill, you do it way in the back.
http://www.urbandictionary.com/define.php?term=camper
camper: A term given to those in an online multiplayer game (usually FPS) who will place themselves in a strategic position and wait for an extended period of time until a target enters his field of view.