But I'm pretty sure it's like most of the other "Oh My God!!!! The Sky is Falling!!!" big scary thing trends
My grand-niece (daughter of the right wing covidiot in our family) just posted it happened to her and another woman at the airport.
When things like these start popping up like flies - expecially from anonymous (here) or suspicious (my niece) - I tend to doubt they are real. And they are usually confirmed to be the latest big scary thing trend.
Like this:
https://appleinsider.com/articles/21/09/17/viral-airtag-discovery-behind-license-plate-likely-staged
And this:
While most of us non-predators can only imagine the reasons for secretly placing tracking devices on someone’s car, the very existence of these $29 AirTags and the countless others like them are undoubtedly going to make people feel unsafe — and are a fertile breeding ground for conspiracy theories and anti-sex work bias alike.