You cant avoid it completely.

I am searching for adult content, searching for keywords like "*******".

Then I mark randmomly about 100 files and go to work.

So I also received that kind of files. When I watch my files i kill them of course. But in meantime also on my computer are that kind of movies.

I agree to you that those people who spread this files should be punished (sent to jail as our laws do not allow harder punishments) but it isnt always that the computer you downloaded that file from is from a pedo.

I am NOT and believe me: Because of my logs i know that lots of persons downloaded those files.

I think it would be a big help if those clients start to include an automatic filter for preteen, kiddy, etc.