Earlier quoted context omitted.
Because that's not what happens with stolen catalytic converters, so it wouldn't change anything. Stolen cathalytic converters are valuable due to precious metals that can be extracted from them.
We currently successfully regulate freon emissions. How do we do that? It surprises me that it's possible but it seems to work.
There are a lot of AC systems repaired at stations that don't even own a recovery machine. (This is legal, so long as the system has already leaked out to nothing before starting the repair. I suspect that gets a wink and a nod a fair amount of the time.)
Some refrigerants can only be legally sold to resellers or to users with an EPA certification. Sounds strict, huh? Well...the 609 certification test can be done online, is open book, and cost me $25 and 15 minutes to get.