There are a lot of people on these forums and others who have a lot of ideas about what it means to manage a network. In fact many of them will actually argue with you about particulars. Let me share this bit of knowledge with you as a person who is not only a real live network administrator but I work for a private industry ISP.

#1 P2P networks are heavly monitored by various organizations for not only child porn but for copyright violations.

#2 If you are using public infrastructure i.e. an ISP's IP address and you're communications with an anonymous public. You have a limited expectation of privacy. This is akin to publically walking naked and then complaining that other people can see you.

Ultimately, what I am trying to say is don't worry about it. Someone is always watching and waiting and will take the appropriate action at the appropriate time.

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Lee Evans, President
LeeWare Development
http://www.leeware.com