I would have assumed that people linking to fanlore pages is something people who create them expect, but if someone has recently posted something that was linked without their knowledge from fanlore, they could wind up with unwanted traffic in the event of a controversy.

I'm not sure how likely that is to happen, though. I, too, would be inclined to leave the burden of permission on Fanlore there, but perhaps if writing a post that I anticipated being... hot? controversial? popular? or just... arousing... disagreement or something?... then I might exercise restraint and not quote directly from the parts of the Fanlore article that point directly to recent, specific posts?