This certainly has changed topics on me a bit. And I wasn't even asking about what was legal! I suppose, given the information that the government CAN look in your computer and see what you have been looking at, it makes sense to not make anyone watch you more carefully. If I were an FBI agent, I would certainly pay more attention to individuals who worte stories about pedophilia (even though writing stories is legal) or read them. Then, as some of you have said, if you download porn regularly, some stuff you do NOT want to have on your machine sometimes gets downloaded by accident. If you have NOT been on forums expressing desires that represent illegal activities, this accidental porn is less likely to be noticed.

True, you can scrub your disk, but this would involve erasing all your stuff, and would also look bad (an empty computer?). I suppose its just a risk I would be unwilling to take. If I was interested in kinks that are illegal, I would keep my fantasies off the net, just for my own safety.