That's no excuse for obnoxiously vague laws. Let's say, hypothetically, the premise of "save the environment" is valid. Instead of banning "tools not commonly f

That's no excuse for obnoxiously vague laws. Let's say, hypothetically, the premise of "save the environment" is valid. Instead of banning "tools not commonly found in the residence", which is completely open to interpretation, you could specifically ban refrigeration evacuation equipment. This is still bad (as it singles out HVAC repair folks), but it's worlds better than letting enforcers arbitrarily decide whether a vacuum pump, security torx set, tachometer, or ignition tester is verboten. Also, oil changes are specifically allowed, and they are one of the primary causes of pollution from home car tinkerers.