I swept up some trash that was around my neighbor's trash can yesterday.
This was only after seeing it there since last last trash pickup. They
are brand new neighbors & I gave them the benefit of the doubt. Maybe they
are still busy & didn't notice it. ??

It bugged me enough that I thought, what the heck. Clean it up.

In your case Richard, I wouldn't really rush to clean up the glass. Do you
think these people are still upset that someone broke their windshield?