Montreal is easily one of the most bike-friendly cities in North America, and yet even here we have carbrains who feel perpetually entitled to 250 parking spaces (the amount removed for the new bike lane) over the needs of everyone else. Clearly someone felt so strongly entitled to their parking that they threw thumbtacks in the new bike lane.
Thumbtacks won’t pierce the walls. Two inch nails with rubber bands wrapped around the bottom creating a base might do something like that, but that’d be wrong and illegal and a silly idea that’ll get you some unwanted attention
Hypothetically speaking, I think tetrahedral caltrops would work better.
I’m trying to picture this contraption you describe (for educational, completely non-practical reasons of course), where does the cotton and rubber bands go?
https://www.instructables.com/Instant-Caltrops/
Opposing motorism AND freeing chickens from captivity. Good instructable!
Cotton was a typo, meant bottom. !0------- there you go
Wouldn’t that angle the tip downward though? Unless you were hand placing them upward
That’s how i got a flat once when I drove away after parking in a sketchy place.