I remember that now that you mention it. LOL Gotta love Wambach's approach.
Many years back, I was doing a training session on defending w/the offside trap. This was with a relatively young, but unusually clued-in travel soccer team that was playing a flat-four in the back already. One of the players astutely pointed out that refs (the often crappy travel soccer refs) often fail to recognize the offside violation unless it's super obvious.
So I told them that, when they stepped up just before the pass was made, all four of them should all raise their arms to signal offside while doing it - just to give the ref or AR every chance to recognize the situation. And of course, taught them to instantly recover just after the pass was made just in case.
The moral being that, as Wambaugh demonstrated, it can be useful to "help" the ref out sometimes, as long as it's done mostly respectfully.