Oh, your poor systems! Don't you have your own game room/area with a padlock?
actually I do. This vectrex was just out since I brought it to a game con and had just unloaded everything the night before and didn't get a chance to put it away. The famicom was inside a cabinet with a child proof latch that I guess wasn't so child proof.
When you have kids I think it's a given that something you love will eventually get colored on.......