Why would a VPN provider in eastern Europe care to do something a court in the US asks them to, though? Or the proxy provider in asia? Or the Tor nodes across south america?
I love your optimism.
According to National Public Radio, the Bush-ERA CIA operated prisons that held more than 15,000 "secret" prisoners in more than a dozen nations including Poland and other European countries, Saudi Arabia and other Middle Eastern Countries, and countries from other areas of the globe as well.
Operating under the legal theory of "special or extra rendition," these individuals had (have?) no lawyers or contact with their families and were often tortured.
And that is only what has come to light thus far!
From Internet monitoring to cell phone records, the US' National Security Agency (NSA) monitors pretty much anything they want to world-wide.
Nothing in what I've noted thus far even touches on US public and secret cooperations with security services in Britain, Israel, Saudi Arabia, Poland, etc.
There is also the rarely examined "independent" companies that host law enforcement data and share with other organizations outside the scope of laws that prohibit such organizations from sharing such information or European laws that protect the privacy of the individual.
I stand by my previous posting:
In the end, the old advice still stands, "do not post anything that you would not want attributed to you on the evening news at the worst possible time and with the most unkind possible bias."