I like this idea. It's pretty frustrating to be, say, gunner on a goldfish standing helplessly behind your occupied gun getting increasingly annoyed as they ignore you while the ship is going down in flames... "Hey, I need to use that gun... Uhhh.... can you get off the gun? Dude. GET OFF MY GUN. THE HULL IS ON FIRE. I HAVE A PIPE WRENCH. GET OFF THE GUN!!!!!!"
(nearly direct quote from a match I played the other day in which this exact scenario happened... minus the profanity that probably came out of my mouth
)