US STAMPS TO BE TRACEABLE

My first impression is that this idea needs some rethinking or, at least, a cost-benefit analysis.

Beginning with bulk or commercial mail, the Postal Service will require "enhanced sender identification" for all discount-rate mailings, according to the notice published in the Oct. 21 Federal Register. The purpose of identifying senders is to provide a more efficient tracking system, but more importantly, to "facilitate investigations into the origin of suspicious mail."

This action by the US Post Office addresses only commercial and bulk mail but it is intended that, in the near future, all mail will require traceability back to the sender via uniquely identified stamps.

It might not be achievable. One thing that comes to mind is mail that originates in other countries which wouldn't have unique stamps. Also, how would traceability be possible when a large amount of stamps are distributed by machine?