Face Guarding

[ShoeBall]

I don't think it's the ref's job to teach the players and coaches the rules during a game.

If the kid is doing it sparingly and unconsciously, then give him a warning.

If she is doing it deliberately and constantly, then slap her with the T.

At least that should tell the teams that if they want to institutionalize a tactic, they had better do their due diligence and make sure it's not against the rules.