Collecting range brass
By all means police your spent brass at any range as the next shooters appreciate a clean range.
If the purpose is to reload ,bag it,if not place it in the brass recycle bin.
Reloading brass of unknown history found at the range is a real iffy thing.
Like a 20 buck hooker and no condoms. You know it's got a history of usage but just don't know how safe it'll be to be used again.
Lots of good ideas here to catch your brass or at least collect it.
Be a "Green" shooter and reload and recycle.
Gord