I agree that I'm darting around, but it's in the interest of truth. Here's the problem: if Aaron was running an automated MAC randomization system for the purpose of personal privacy, he would never have known that his MAC was blocked. The details of his case show that he was aware, but this OP describes a situation in which there is no awareness. If the law is primarily concerned with the knowledge aspect, this can be attended to on a case by case basis. However, much of the discussion has suggested that a MAC is an identifier, and any alteration of this identifier is criminal. This should not be the case.