P2P T&Cs are long for a reason,
and the longer they are, the less chance u'll read em.
Stay safe and aware or might get a shock
when u spyware your comp with a really big... phone bill.
Get anti-virus software and check your downloads.
Get a Firewall on your computer.
A masked file is a file that says it is one thing and is actually another ( for example, u think u are downloading the latest hot tune, but it really turns out to be a pair of grey hairy balls. Nasty!).
Report all masked files to the P2P network, unless you're doing this
Get spyware and adware off your machine.
Watch out for P2P weirdoes, they'll direct u to their file share and then use it to send u sick stuff. Remember, there no central servers on P2P, so these people are harder (though not impossible) to trace.
Keep your common sense when chatting with others on P2P services.