The issue is that a player can click the spawn controller and release control of the room. Then in mere seconds, a different player, or in some cases even the same player can click respawn, select the room and lock it down for an additional 20k ticks of safe mode.

There should be a cooldown when any room drops to RCL 0 preventing any player from respawning into that room for at least 24 hours, possibly as long as 72 hours. Claim creeps would be unaffected.

That would prevent a lot of the headaches players have with bad manners and just plain bad luck when they clear a room to expand.