A few years ago I got to wear one of these little belts any and everywhere between sunset and sunrise on an Air Force Base, where a "shirt" wandered about gleefully giving people citations/walking tickets for not having one on their person.
Waste of a good NCO's time, or, good use for a
's time ... depended on the "shirt" in question.
I brought it home, as I had begun to jog in the evening with it wearing it like a sash. I used a permanent marker to inscribe "Mr Backhair 200x" on it as though I had won a beauty pageant for being hirsute.
Definitely a "shoot me" belt should a terrorist have arrived on the base after dark ... none of the host nation folks wore them, and I think they thought we were daft.