Take for example Harry Potter. In my personal opinion, the author is a trash person, and I personally will no longer invest my time, effort, or money into their franchise. However, the stories and lore and fan base are still good. There is an actor who had a recurring (and popular) role in Star Trek: TNG (and a few episodes of Voyageur) who turned out to be a trash person. But, the memes and other content being posted about their roles are still funny and entertaining.
The difference is the creators in question aren't the ones making that content. A webcomic about the world of Harry Potter created by someone else has levels of separation from the source material, but if JK started a webcomic, I would object to it being posted and promoted here.
Perhaps. I'm gonna leave that determination up to the people doing the work, though. I don't think it's fair to try and convince a volunteer that an additional rule is or isn't too much work to manage.