I built those cases just because I thought it would be a fun project. They get lots of positive comments at the range, and I admit I like opening one up and removing an AR from it. But the guitar case thing has nothing to do with trying to thwart thieves.
Buying the first case was sort of funny. I went into this music shop and the clerk was helping another customer, so I started looking at the cases on my own. I know nothing about guitars, by the way. The other customer left and the clerk asked if he could help. I said I needed a guitar case, and he asked what kind of guitar I had. None, I said; this is for a little project I'm working on. Since I assumed any music shop guy would be a hippie, I was trying to avoid the subject. But he persisted, so I said I was building a rifle case.
Silence.
Did I bring the rifle with me, he finally asked? No, said I; I didn't think he'd react kindly to that. He said that if I had just carried a rifle through the door, we would have had a gunfight, but if it was in the car, he was fine with me bringing it in as long as he knew what was up. He turned out to be pretty cool and helpful in choosing the right case.