Okay, I'm fully prepared for people to hate on my dad haha...
My dad is actually an Emissions Control Officer for the DEQ in Woodbridge. Steve and Dan are right; not running any cats WILL get you in trouble and if the shop has any competence, they will fail you on the visual inspection.
Yeah, those sniffer vans are all over the place now. I see them around the Springfield interchange weekly. Just run some HFC's and play it safe man