In a game recent the opponents other than the goal keeper crossed onto our side of the field. One of our players than moved forward to thier side of the field from our side. Since our player could not be offsides while on our side, and the defenders are not on thier side, is our player than offside because the defense has vacated thier side of the field? If he is offside, then that means that a defense merely needs to move all the way into the opponent area, play thier fastest players and everyone who goes pass them must then be offside?
USSF answer (October 20, 2009):
Of course your red player was in an offside position, but not necessarily offside. For your player to be considered offside, he or she would have to have become involved in play. In any case, the red attacker is absolutely prevented from becoming involved in active play, but every other red player is free to make any play possible for the ball, and any particularly fast red player would have a field day.
Believe us, if the strategy you propose actually worked, teams would use it all the time. Do you ever see it used? No, because it does not work. And there is no such thing as “offsides.”