Unfortunately this is an issue that comes up when you have satellite weigh-ins. I can assure you that at the Derby sight everyone was checked.
I even heard that one club took advantage of our "weigh your own kids in" option and weighed their wrestlers in on Friday!!
I would bet there were some weight allowances given even thought there was a zero tolerance for open.
If people/coaches/clubs are not going to be honest these options will not be around very long.