Right. And that would be my point. That why do people use gmail and yahoomail, etc, when they have permanent records of every single word you write, but people would be outraged if the USPS scanned every piece of mail contents and sold it to advertisers.

And again, with private shipping companies, it's not like they are going to open 100% of everything. But the large email companies can, and have it forever. Can look at it 10 years from now, if they choose.