Yeah, when the check-cashing place rejected it, I figured I'd mail it back and hope for a gift card. (Maybe I shouldn't have tried to use my fake ID with the name "Tom Foolery."
I walk a lot and find cancer causing cell phones, wallets, and checks all the time. I hate being burdened, so toss them in the nearest USPS mail box, sans any cash.
The security thread in currency bills actually is radio-interactive. When you pass through a scanner at the airport, security can detect the amount of cash you carry; coins too. Then of course the thermal paper used for cash register receipts is coated with toxic, Bisphenol A (BPA). No escape.
Jesus, Ida, what beans are you gonna spill next? Don't tell them about the nanotrackers in their fillings or the photoreactive tattoos the pedicurists are secretly etching on everyones toes.