Quick positional question. If you are AR on a game, where is the best place to line up for judgement of offside? dead even with the last defender,or even with the back heel of the last defender to see across the plane of their back. second, u15 post match the winning team goes back onto the field faces their fans sideline,lines up performs a chant,with or without choreographed movements. unsporting behavior? same question post match in youth games,and parents coming on field post match,and forming a “winners tunnel” for team to run through.

USSF answer (November 29, 2011):
1. The AR should be level with the second-last defender. If you are confused about the status of the goalkeeper, just remember that the ‘keeper is a defender, a member of the same team as the field players. If you are confused about whether to line up with the second-last defender’s back heel versus his torso or kneecap or forehead, you need to review the USSF publication “Guide to Procedure for Referees, Assistant Referees and Fourth Officials.”

2. The game is over. As long as nothing derogatory is said about the other team, who cares?

3. Such things are rather juvenile, but who cares; the game is over.