I have an RFID-blocking waist stash. It’s worked once on a tag at Urban Outfitters and a guy who uses the same one on the old subreddit said it works on spider wraps and RFID stickers. I tried it on a spider wrap at Walmart and I beeped. I’m thinking maybe it’s because Walmart uses an AM system for their spider wrapped products? Or maybe it was a coincidence that the Urban Outfitters tag was unactivated.
Edit: Should add that it didn’t work at VS either for a girl on Tumblr