In a world where we pay for stamps, why didn't bulk unsolicited mail go away? This won't work.
Nobody is talking about TSA, what a non sequitur.
EDIT: Parent comment was replaced with something completely different so my reply makes no longer makes sense, but I'm leaving it unchanged.
Different situation. Bulk mail is not illegal, in fact the USPS subsidizes it. Spam calls ARE illegal. Hopefully phone carriers will not give discounts for explicitly illegal uses of their networks, but we can deal with that later if it happens.
I think that's assuming that things always go poorly, and that there is no possible way for it to go well. Sometimes things go well.