If it gets to the point where you can't spawn and get a shot off or drop a nade, an admin should probably do something. The point of the maps is total carnage, but spawn camping to THAT extreme is against the server rules to my knowledge.
You can spawncamp, but the team can't be dying instantly everytime for no reason. Some maps though there's a flag to get in the enemy spawn so that sort of thing is even necessary to win.
Let the MGs be many!