Hi Folks... Lots of helpful/thinking out of the box ideas here. I especially like the red rubber porcelain beer cap washers. Truthfully, I've been playing a guitar since 1965, and have never had this problem...period! I have never used/purchased strap locks, wouldn't even know what to look for. Guitars' like so many other ''tools/equipment'' need to be checked/inspected ''frequently''...the more frequent the use, the more frequent the inspection. It sounds to me, as though worn out straps, and lack of frequent equipment inspection, are as much to blame as anything else. Gretsch strap button studs, have a very small recessed Phillips head, they are screwed from the factory, into either solid mahogany in the solid body models, or into a solid block in hollow body models...and unless they've been removed, and the hole fiddled with or modified, they will not loosen or strip out, and as @mrcoffee has already stated, a drop of Loctite will more than secure the button. In 2020, I removed the Gretsch strap buttons, when I built the Malcolm Young Jet relic replica. and replaced them with Fender style strap buttons, as Malcolm did on his original. the studs were so tight, they squeaked coming out. The chance of these studs loosening off was slim to none and the buttons, were secured from the factory, with blue Loctite. I had to wrap the buttons with paper towel, and use small vice grips to loosen them. They weren't going anywhere either! Being an avid scuba diver, diving with a rebreather, equipment inspection is my life...and I follow that philosophy through, on everything I own. On a slightly side-bar topic... Those of you who know me, know that I have been absent, due to my wife's stroke recovery, Although I've made a few posts in recent days, I'm not really back...just in desperate need of a little distraction...my wife's recovery is not going as hoped. Best, BIB.