[checkmyparanoia]

several players in the team or entering the door?
the other bases should have warping ability or some other special quality.. right now they arnt used for anything besides winning (no function like b1's warp.)

the red spot should be shown if any enemy is within proximity to the door (otherwise people could stay within firing range of the door but not be next to the door and therefore not cause the red dot to appear.

btw stefan, a long time ago you were on and testing out nukes? perhaps one of the other bases could be used for this as its function? fired from heavyinfantry and\or defenders to a base of your choice with a several-second long warning (alarm noise to people in the area of the base being bombed)