Is your game room a museum or an arcade? If it's a museum, put up velvet ropes, bulletproof glass, etc and let people stare and admire the hard work, dedication and time it took to create such masterpieces. If it's an arcade, you have to think in the back of your mind that stuff can and will happen to besmirch the pureness of a masterpiece.
I don't care how well-behaved my friends and family can be. When they play my games, I expect something to happen, be it from negligence, an accident, or some combination of the two. If I don't want anything to happen to them, well then I have a museum and I'm back at the velvet ropes & bulletproof glass.