TOR : http://en.wikipedia.org/wiki/Tor_%28anonymity_network%29 / https://www.torproject.org/
Will my ISP disconnect me for running a TOR Exit Node? What if I have disclaimers? What if I block all outgoing ports except 80 / 443?
Am I likely to get "noticed" by people I'd rather not be noticed by? What are the consequences of me doing this?