I stupidly caused myself some embarrassment with a referee in the eighties. My youngest son was playing for Devon under 15s when the ref signalled a throw in from a ball which had clearly not crossed the line. In a very loud voice I reminded him that the whole of the ball had to cross the whole of the line. From quite a distance he blew his whistle to bring the game to a halt and very slowly walked over to me, with about 200 eyes on me. In an equally loud voice he reminded me that he had the right to remove me from the ground, and would do so if I continued to heckle him. All I could do was nod and try not to look embarrassed. In the changing room when the kids asked whose dad it was, my son disowned me.