I was the measurer for a number of national and state titles in two different classes. Every boat was weighed prior to the Nationals event and if I was feeling sadistic randomly in the nationals or States. Competitors were warned this may happen.. But it wasn't a huge job to do and almost everyone was helpful.. Took maybe 10 minutes if the scales are set up ready..
The thing is when I was measuring I wasnt alone. So any issue was well known by the local fleet.