Dead right.
As a pilot I'm appalled at the behaviour of some visitors. Most are good guys, but there are a few that don't seem to understand that my aircraft is owned by me and my group.
It costs nothing to be polite, yet some are amongst the rudest and pushiest people I've ever met.
Still, the worst I've ever met was the 'spotter from hell' at Kemble who threatened a 6-year old.