I don't understand the commentators that think there's nothing inherently wrong with the "Simpsons porn" but still think this charge is all okay because he's been convicted of having child porn before, as if that makes all the difference.
If what he's doing isn't wrong, it shouldn't matter what he's done in the past. If what he's doing is wrong, it still shouldn't matter. I can't see any way to logically arrive at the conclusion that justice was served here solely on the basis that he had done wrong before. They say Justice is blind, etc etc.
Look: he was probably ordered to stay away from schools, jobs involving children, etc. If he has violated that, he would be charged with breaking parole or something similar (whatever the antipodean analogue thereof is) and we would never hear about him. Instead, this is something it appears he was not told not to do, is not normally illegal, and wouldn't be considered wrong if someone else did it... but yet he's being charged with a crime ONLY because he had committed a previous crime. I can't see this as anything other than the Australian authorities on a witch hunt to target anyone classified as a "pedophile". I (admittedly) don't know much about Australian law and politics, but if this were the US, it would almost undoubtedly be some prosecuting attorney wanting to demonstrate that they are "tough on crime" to further their career.
On the other hand, since I having a daughter a little over a year ago, part of me can completely understand the knee-jerk reaction against pedophiles (if anyone hurt my daughter, I can't say what I would do to them)... but I just can't see having that reaction against this guy. I don't think he hurt anyone here. He may have contributed to hurting minors in the past, but it appears he's served his time for that. The law says he's served his time and that's over with (if you want to argue that he should have been punished more, go ahead, but that's irrelevant to the case at hand). He apparently hasn't hurt anyone since. There's no reason this should be held against him.
In short: I've seen a few Simpson's porn pics in my day. Most everyone who's been around on the internet this long has. I've seen most every cartoon, tv show, comic, book, etc Rule 34'ed. I laughed and continued my day. I don't think there was anything wrong with me doing that, and I don't think there's anything wrong with anyone else doing the same thing, even a convicted child porn trafficker. This is a misapplication of the law.