Lots of stupid traditions or rules out there like not putting a hat on a bed, that are just ridiculous and have no basis in fact.
Was wearing a "cowboy" hat many years ago during a fly-fishing trip with several other writers, mostly because there was some chance of rain, and a wide-brimmed hat kept raindrops off my glasses. (Used to write about fishing a lot too, in fact one of my old books is all about the subject.)
When we got back to the lodge where we were staying, and I took my hat off and threw it on the bed. One of the other guys immediately almost shouted, "You never put a cowboy hat on a bed!" There may even been a comment about it being bad luck, but in any case I had NEVER heard that before, despite growing up in Montana, and working on more than one ranch. The other writer had grown up in upstate New York....