Was thoroughly cleaning a Smith and Wesson Performance Center 686. Upon removing Hogue factory grips discovered a tattoo. I can feel the etching which looks like a QR Code. Talked to my son and he informed me it's not exactly new. Mentioned it to my wife and she said your fears are confirmed, "They can track you." Of course she got a big laugh, at my expense. Am I way behind on current trends? Who would use or benefit from this benchmark? Are other companies utilizing something other than serial numbers?