*nods* Definitely I always post a disclaimer if that's the way I'm writing the fic. I also get permission if I'm using a specific muse that I'm RPing with/using in the fic. It's common courtesy to do that. A lot of times I'll write XYZ is not tied to anyone in the community unless they'd like it to be. :)

I think it comes from the RPside of things. Like I said I rarely RP and in my case in the Buffy fandom it's such a freaking revolving door of muns/pups that I only have a few that I interact with anymore. So I'll put a disclaimer that 'my' Angel isn't the Angel in TM. However, if I was in a Buffy/Angel community where there were a list of certain characters and we were all RPing together I would most definitely get permission before I posted to the community.