True Story
Heard this from the man in question. A certain senior engineer in the GA industry, well known to members of the association for whom he works, got anonymously checked at a fly-in. Received a snotty letter from the RCA demanding to know why he didn't have a license for his radio installation.
He sent a polite letter back pointing out that the radio in question hadn't worked for 5 years, he had no intention of fixing it, but it filled a hole in the panel.
Less trivially, although ramp checks are very rare over here, I have always liked to think that in the event of things going pear shaped, AAIB's report wouldn't contain enough meat about errors on my part to make the life insurance company play silly ******s with my family.
G