[ComputerGuru]

Yes it is. USPS first class (ie regular not bulk) mail IS absolutely private and may not be opened by authorities without a warrant (and tampering with them by non authorities is a federal crime).

What security agencies have done is scan and collect all envelope info (metadata) which was ruled to be not private (makes sense) but with powerful enough cameras, lights, and enhancement software that most letters sent in standard envelopes can leak their contents.

[tehlike]

And exploiting security bugs is not unlawful? This is a secyrity bug in the transport mechanism of data.

[ComputerGuru]

> And exploiting security bugs is not unlawful?

Not when you have all of congress (minus a very select very few) wagging their tails and eager to please you it's not.