I'm going to throw a monkey wrench in the gears.
I have a friend of mine who is a guard at a low-security federal prison. (In the feds, there are 4 main levels of security, high, medium, low and camp. The camp is for non-violent first time offenders who have less than 10 years on their sentence. The camps have no fence and all inmates are considered trustees.) He told me that there are dozens of offenders in his low security institution (meaning behind a barbed wire fence with armed guards pacing the perimeter at all times) who did nothing more than download or be sent a few photos of teenagers nude. Notice that I do not mean production or distribution of these images, simple possession only. Possession of underage photos is considered a violent crime to the feds, and thus these inmates were forced to be in with bank robbers, etc. When the guard asked why these non-violent offenders were in with armed bank robbers someone told them that the feds take into consideration the violence that is behind the production of some of these images. Keep in mind that these people that had a few pictures in their computer were not the ones who produced it, as most of that stuff is produced overseas in countries like Brazil and Thailand. These guys in American jails had nothing to do with these teens other than visually seeing the image. Also, there did not have to be any signs of violence in the image or on the person in the image, just the fact that "some images produced are made violently" was enough to categorize every single person to ever possess an image as a violent offender.
Now you make heads or tails out of that.