You know I’ve been ~quietly stewing~ about this ask all day, and then I wasn’t gonna answer it, and then I decided it’s a fair question.
I guess I don’t think so. Obviously, or I wouldn’t do it.
Now, your mileage may vary, but for me, the FUN of fandom sort of works on a call and response system. It’s no fun to play with yourself (actually, it’s a lot of fun, if you catch my meanin–SHUT UP MINA) I’m never more delighted than when I see someone take an idea I had and play with it themselves, whether that’s working a headcanon into a fic, drawing something based on it, writing a continuation of a fic I did–I think it’s all highly complimentary, that someone enjoys engaging with your work that much.
I’d be more a Stephanie “Publishes particularly good fanfics on my website” Meyer than a George R.R. “GRRRRR YOU KIDS GO GET YOUR OWN CHARACTERS I’M ANGRY AND OLD AND SHITTY” Martin if I were ever a published author, so this is probably my biases playing into it. But I mean, let’s be real here, WE’RE ALL RIFFING ON SOMEONE’S CREATION. And I mean, that’s mankind, on the whole, fanfic has been around from the first story ever told, everything is fanfic, really, everything is a re-imagining of stories that have been told before, to different degrees.
Now all that being said, if an artist got particularly miffed with me for doing it, I’d remove it. They have every right not to want to play the same way I do.
But I’d roll my eyes pretty hard.