I think it is a big leap of specious reasoning to go from "enjoys a depiction of something" to "will commit an act." The fact that I can enjoy an R-rated movie doesn't mean that I'm going to go shoot someone. If I watch porn, that doesn't mean I want to go participate in an orgy.
You attempt to marginalize the free-speech advocates that would protest the persecution of someone on these grounds, but there are a number of reasons for someone who is not a child molester to want to defend someone so accused. Most significantly, as the GP said, prosecuting someone for a "crime" involving purely imaginary entities where no real person is harmed is tantamount to thoughtcrime. You are fine with this case because you find those particular thoughts morally reprehensible, but other people with other values might find the thoughts of you or I to be equally vile. Should we be imprisoned for our thoughts just because some other group finds them despicable?
They came for _blank_, but I said nothing, etc. etc.