Did the same for a while, right behind my wallet. Until.... at a job one evening on a roof top I heard a window shatter. Looking over the edge I saw a boy running like crazy with a microwave I had put in the passenger seat of my truck. He smashed the window, did a snatch and grab and hauled booty. I realized that the Colt was useless except as a noise maker.
Started to carry a 9 in my tool pouch after that, then a 1911 Llama 9 in the truck. That didn't work for long so went to an old beat up Taurus 40 cal IWB.
Funny thing about that microwave, except for me having to replace the window, it was fried and was headed to the dumpster anyway. Must have been funny watching him tell his Mamma what he got her.
Mike... thought about putting that sign by the mailbox but someone would steal it.