Nah it can couse lagg and it is just a plain idea. I think if you really want to get rid of campers just make the layout so there is no place to camp. Or just put no power weapons on the map. It's a good idea, though.
Camping sometimes can be used as strategy, but i hate it when its the only thing people do for an entire match. That said, they implemented a similar idea in the head to head playlist.
Its also a good idea to make a delayed door opening. Construct a fusion coil, grav lift, fusion coil, grav lift, fusion coil, grav lift chain. You get a pretty large delay time, so when you shoot a fusion coil, you could get a door open after 10 seconds.
Nice and sexy idea sir. I think that the mechanism should be below the camper though. Also probably a high respawn time for the fusion coils and not spawn at start.