Identifying thumpers at a distance? GREAT!
So, if I can use the fact that a person isn't using one of these devices to infer they are a thumper and stay the hell (pun intended) away from them....
Damn. Now I am conflicted about this tech.
You know the old joke:
A: It's a shame stupid people don't wear some form of identifier, so you can avoid them.
B: They often do: it's shaped like a little t.