I don't like fan fiction, don't read it, but about a year ago I was googling stuff about 'Vampire Hunter D' books which I've read all of them, and came across a fan fiction place where different scenarios/stories based on 'D' were envisaged, and they weren't copied, so I think as long if it's harmless fun, sometimes it's alright. I'd say most of the fan fiction based on King's stuff would be 'Dark Tower' related.
don't fan fic anymore, it's all my own stuff now. But i enjoyed writing with familiar characters while i worked on my ability, call it training wheels.
now i write small stories, with sneaky twists, trying to outthink the reader, before they get where i'm going .
Stephen doesn't allow people to use his books or characters without permission, so I have removed the link to your DT short stories.
Marsha will be back on duty on Tuesday if you'd like to ask for permission to post those links here.
I got hit with a surprise "we're changing all the electrical plugs in the apartment starting two days from now" notice hanging on my door when I returned home Friday night, so, movie time out the window, I'll be moving furniture instead.