Okay, I was only being half-serious when I said that I hate you all for making this thread (well... I do, but I'm on /a/. What can I do) but now you're just being stupid.
Do you honestly believe that whether or not a mangaka ever drew porn has anything to do with what people do with his work? If you do, you're wrong.
The only thing that explains porn of completely non-pornographic shows, sexualization of little girls, crazy slash pairings, strange crossovers, etc. etc. is that the only things the people who create doujins are influenced by are their own strange imaginations and perverse fantasies. Rather like the mind of anonymous when he comes up with nonsensical shoops and memes.