[quote=Russell]Maybe they’re trying to do a sting, or at least QC test, on Smog Check places to see if these roadside results line up with recent smog test results sent to the DMV?[/quote]

Kinda hard to prove it was the shop’s fault if it doesn’t match up. For instance, I could have had a cat on the car going into the shop and taken the cat off after passing. (not that I would do that).