[inuniverse]

Cool and thought-provoking idea! I was struck by this statement however:

Right now we are building our first Crowbar. All different parts are working and ready for assembly. Next step: testing with Crows.

Why not start with crow testing? That's the "Talk to customers" of this project [0]. Instead, they started off with something we can be sure of with today's technology: machine recognising cigarette butts.

[0] Technically talking to city authorities should be the first step, but I couldn't tell whether this was a for-profit project.