I voted "I have in the past".
I admit I used to download music and occasionally software over P2P.
When I started with software I got viruses, but they were few and far between and easily dealt with.
Then the P2P application I was using, Morpheus, had an update that made it so that hardly anything could be downloaded, even if it was legal; the program told me that what I was trying to download had no copyright signature and was therefore likely to be illegal, and stopped me downloading it.
There was no easy way round this, and no way to go back to a previous version.
So I uninstalled it and have ever pirated anything since, partly because I can do without viruses, partly because I never found another P2P application I liked.
I did try and get a few albums from BT, but they were old torrents and never worked.