The most common porn sites use standard formats that can be filtered out. Go to Preferences and enter !!!! and / and AWESOME into the filter sections and this should prevent most of the offenders from appearing in your search box. However, the key give-away is usally a low kb file size in comparison with other hits under the same title. Just do not try to download anything that looks suspicious. However, when I started out I innocently downloaded everything and never had any problems. The only reason I became aware of the problem was through the threads on this site. So, my experience as a Mac user is that most of these "traps" are designed to hit pc users.