Had similar situation in feeders. Big push to use horn at ALL times: rounding corners, crossing streets, parked cars, peds, backing, the usual.
Had rider on annual ride to a relay meet...about 2 A.M...at truck stop. I already announced I ain't honking horn every time I make a move and I don't EVER honk horn in here...not at 2 A.M. with all these trucks parked and sleeping. He said you HAVE to. I said, "OK. I need demonstration as to how to do that. Here, you take over. I'm stepping out to observe". No more said...EVER!