As an aside, I’ve been toying with the following idea:

I like to refurbish bicycles for my own use. The idea I’ve had is to buy cheap Facebook marketplace / Craigslist bikes, disassemble, grind off the serial, and paint in a uniform and non identifiable (or at least less so) and reassemble, replacing wear parts. Put them into the community to use however they see fit, cheap enough to ditch without caring.