Use Good Judgement Before Using TOR

Tor can be useful for a lot of situations where you need to tunnel out of a network or mask your originating IP address. Even so, TOR is useful for intruders as a tool to hijack your sessions and snoop on your data.

Header over Team Furry's blog and read their three posts about the matter: On Tor, TOR exit-node doing MITM attacks, Flushing out MITM attacks in the TOR network. Doing so might open your eyes.