When I had no money, i would take off the strap buttons and put a big washer over the button and the strap. Of course, that was on cheaper guitars. I use Strap-Locks on my Les Paul, and a Dimarzio Cliplock on my Jazzmaster. Also, on black straps you can spray paint the ends so they harden and it's hard to knock them off. I do this for guitars that come thru the ole repair shop. Later,

Atomic