Interesting - I had a similar thing about 15 years ago.
A chap I was renting some hangar space to had a nose-over in his tailwheel aircraft on landing. Nobody was hurt, and the bent airframe was pushed back into the hangar. At the time, he didn't really say what had caused it, and I didn't ask too much.
A few weeks later I had a phone call from his insurance company asking if I had any insurance cover for the airstrip because thy had been told by the pilot that the grass on the 650 metres he hadn't managed to shop on had been kept cut too short, and therefore not providing enough resistance to slow him down on landing!!
Since then, I've always been cautious about visitors - there are a frightening number of Aero-Muppets out there.