Yeah, like even just leaving them on a jeep is weird.
A person who shares a niche interest connecting with another person and handing over a token is a very basic human interaction and we're wired to love that shit.
Removing the human interaction just removes the point of the whole thing. And if I had a jeep, I would quickly get annoyed that people kept putting plastic junk on it that would fall off and pollute if I didn't take care of it.
If some person came up and said "nice car, wanna duck?" I could still thank them but not take the duck.
Just people going thru the motions of things they don't understand to fit in. In their head leaving plastic garbage all over made someone's day and make them part of a community.
There are better ways to get that dopamine that actually help society.