Another interesting thought about MACs and any other chip-based IDs that get floated in the future. Spoofing aside, while MACs are supposed to be unique, there are a lot of dodgy mfgs that just burn the same MAC or set of MACs into entire batches of chips at a time. If a new standard was announced, it would be interesting to see the results of orgs trying to take advantage of the ID while shady mfgs continue to not give a flip.