Situation: Finals of a weekly tournament, last game of the last round, 4 players, on Jackbot. P3 finishes and walks away, p4 comes up, and there is a ball coming down the field. He catches it, and calls for the td. There was no disadvantage to p3 or any other player, and no advantage gained from p4 catching the ball. P4 was directed to drain the ball, it registered and recorded bonus for p3. Technically p4 could have been dq'd - he 'played' another players ball, but the ruling was to play on - no harm, no foul.