Urrgh. No no no. Creative works belong to the creator.
I think people should be free to make fanworks and derivatives – up to a point, recolouring and stuff like that is not derivative – but even then it should be done with respect and credit to the original artist.
I would contend that anyone who doesn’t understand that is not a creator. I’m no artist, but as a writer with a built-universe I base my stories on, I’d be like “sure, you can write a story in my universe if you want, that’s awesome, but no, you may not define canon… it’s my world. I make those rules.”
Art is the same, I think it’s okay to draw other people’s (fan or official) characters and say ‘I love this character by XYZ!’
But direct tracing, recolouring, not giving credit and all that – no, you clearly don’t understand the work you’re meddling with.