I always thought there were laws against running a service like this in the US. For example the rules for registering a USPS P.O. box are very stringent:

> To rent a PO Box, two different forms of identification are required. At least one of them must be a valid photo ID. [1]

This way they can actually track you down if you have something illegal shipped to the box.

A service like this where you can easily sign up without properly verifying your identity is just waiting to be used as a temporary drop-box for people shipping drugs from SilkRoad, people shipping goods they bought with a stolen credit card, etc.

[1] http://en.wikipedia.org/wiki/Post-office_box#United_States