Let me add something else:
There is no such thing as a "zero logging" site or service
Anyone who tells you that such-and-so site and/or service is a "zero logging" site or service is full of doggy-poo. Sites and services MUST have, maintain, and keep logs simply to exist.
Without these logs, they have no way to protect themselves from malicious attacks or malware. They have no way to monitor the health of their systems and/or services. They have no way to know if one user is using the system inappropriately, and/or is selfishly hogging resources that should be available for all.
Privacy on the Internet is a myth
The best you can hope to do is limit your exposure.
If you absolutely, positively, want to guarantee your privacy you need to go "off the grid". Any connection to the "real world" at all, be it electronic or otherwise, opens the door to possible privacy issues.
If you're on the grid, you have to assume that someone, somewhere, somehow, can see what you're doing if they really, really, really want to, and conduct youself accordingly.
Even things like "TOR" services and Bitcoin are not infallible. As I said in a different posting about malware: "If they really want your @$$, they're going to have it."
Just think about it - if people can hack places like the Pentagon, the CIA, the FBI, (etc. etc. etc.), do you think your puny little peer-to-peer program will keep you secure? If you do, you're just kidding yourself.
It's kind-of like having a radar-detector in your car. You may dodge the bullet two, three, maybe even five times - but eventually you will end up getting caught and paying the piper.
If you mess around on the Internet doing stupid and/or illegal things you shouldn't be doing, you will eventually have to pay that piper too.