Not really a rule but this has become a huge pet peeve because it has happened twice with the same player:
Never abandon your team because the other team forfeit. Use the time to run drills, scrimmage, whatever. The team all came out to play so you owe it to each other. However, after the rest of the team finishes running drills, scrimmaging whatever it's only finding that same teammate flirting with the gym staff priceless.
Theres an irony and a lesson somewhere!
