Assuming you have already created an account and changed your settings as we outlined yesterday, proceed now to the installation of DownThemAll. You may need to restart your browser but please be sure to get back to this page. (A nice way of doing that would be to make this page your home page :-).)
Search again for "porn" using the search function of Flickr. You should see a few groups devoted to porn. Now click on one of those groups (say the xxx group) . Then click on the group's "Pool" (xxx pool here). You should see pictures from members. Right-click on a member's name and choose Open link in new tab. If the member choose to expose some (or all of his/her photos) to the public, you will be able to see them.
Here's come the DownThemAll part. In the member's page, use DownThemAll (Tools > DownThemAll) to check on all the embedded images in the page. There are a lot of course, but our target are only the porn ones. Fortunately they can be separated from the