The problem is, they aren't really proving they are "solicited". They are just proving they were sent to an address.

I can ship 5 packages to your address and it'd trigger the search is the standard of evidence they are using. Its how people have been swatted.

http://krebsonsecurity.com/2014/06/the-fly-has-been-swatted/

http://www.vice.com/read/i-interviewed-the-fraudster-who-fra...

http://krebsonsecurity.com/2013/07/mail-from-the-velvet-cybe...

The only reason he didn't get swatted again was because he called the police because before it happened because he was monitoring the people. [Hint: He has been swatted before]

This is precisely why this "standard of evidence" is such bullshit. It can be used to harass anyone and is.