Question: Watermarking Fanart

I didn’t realize this until just seeing those Zootopia pics from Heresy but that’s something about my art that I just don’t do.

I don’t watermark and I KNOW I should. But I always hear both sides of the topic.

I’ve heard that watermarking protects artists from theft. But I also hear its a major turnoff to slap your name in the middle of a picture. For my original art I’m obviously going to start doing this but for fan art I’m not so concerned about being protected. I just feel like if I ever did come across anyone making a profit with my art and claiming they made it, I’d have the original source files with dates to prove otherwise. But because its always just silly sketches of things I like that I don’t own I don’t care so much. I just want my followers opinion on the matter.

http://strawpoll.me/6448212

Again. I WILL start doing this for original stuff but. Should I be concerned with watermarking my fanart or is watermarking a turnoff?