Oddly enough, I once saw a flight on flightaware in California showing the tail number of a friend's antique airplane, based in PA, which has no electrical system nor transponder. This was pre ADS-B, so I'm guessing it was an error on the part of ATC, copying a tail number incorrectly.
Apparently someone in TX has stolen my airplane's identity or has fat fingered their ADS-B settings. I got an alert from Flightaware today that my bird was spotted enroute.
Happy to say my bird is safe in her hangar!