The only danger when torrenting/pirating is the download of the actual content itself. With torrenting, a copyright holder will use the torrent to find connected peers and send CnD’s to the IP issuers. With regular downloading, the site you’re downloading from can see your IP and this comes with the same risk of an CnD if the site is bugged/infected. Other than that, browsing torrent sites or download sites themselves carry no risk outside of maybe malicious advertisements or popups.