They should not allow intact systems to be vented when parts are removed. Technicians are to maximize recycling of refrigerants during the servicing and disposal of air conditioning and refrigeration equipment. The certification for personnel who service auto air conditioners is a separate certification from appliances. Personnel who are certified on automotive applications cannot work on non-automotive applications and vice versa without obtaining the appropriate certification. There are new non-CFC substitute refrigerants.
Consumers can buy new substitutes.
The connectors are very different. If you have work done on a refrigeration system, an EPA certified technician must do it. Certified technicians know how to add and remove Freon without releasing it into the atmosphere. If your system leaks and you want the technicians to repair the leak, he will have to evacuate all of the Freon before he dismantles the system. There is no regulation requiring him fix it.