If bandwidth is the only issue, then it's not really a security risk, persay. China, for example, isn't going to own your network because you have a P2P client

If bandwidth is the only issue, then it's not really a security risk, persay. China, for example, isn't going to own your network because you have a P2P client running somewhere. I do get what you're saying about P2P filling up your network monitoring logs, though I would argue that the monitoring software might not be properly configured if such is the case. I don't know all that much about network monitoring tools though, so I don't know the specifics. I do know that it's possible to run a secure network and have P2P clients on that network, however.