Depends on the person, some take the advise as a learning experience as when I point out an issue I always like to offer a solution as well. Some like to argue and tell me how many flights the airplane has on it with the discrepancy. One of the rules we have in racing is that no EZ connectors be used. You know the little barrel deal that goes on the servo arm with a plastic or metal press on peice then the pushrod is set screwed into place. A guy had one on his rudder. When I pointed it out and informed him that they are not permitted on a " flight surface " he proceeded to argue that the rudder is not a flight surface because it is never used in flight. I just smiled, reached in my tool box, handed him a pair of Z bend plier and informed him that he could either use the pliers or I would be more then happy to refund his entry.
In most cases guys are just fine with what I find and if needed I will assist in correcting the issue so they are able to fly the event.