What I was saying that if a NICS check was proposed to be added to a private sale at a show, the inconvenience argument was not one that would be very convincing, since NICS checks are carried out for the FFL sales.
Whether one should have NICS checks at all is a different issue - remember it was a compromise to get rid of waiting periods after a time from the initial legislation. Of course, any compromise is evil and such tactics are not be preferred as compared to the righteous defeat.
