Our crew has been doing this for years and it really adds a lot to the fun of officiating - we've even had the wives get involved by tattling on dumb things their spouses have done!
We give a "point" for anything we darn well want to - such as many of those mentioned here. We look for spots on uniforms, unpolished shoes, socks not even, etc. On the field, late flags, beanbags that miss the spot, a clumsy signal or mechanic, etc.
We use sub-varsity game points as tie-breakers. All the other crews around here know about our deal, so they'll let us know if someone on the crew does something goofy during a game.
Many times, the guys give themselves the points. The one with the most buys the first round, second place buys the second round, etc.
Our backjudge forgot his hat in the locker room a couple of weeks ago and had to find a janitor to unlock the room before the half started. That was an automatic winner for that week, and we carried over a couple of points to the next week just for good measure.
As I said, we have a lot of fun with it - especially the debate after the game about who had the most points.