You can't be serious, surely.
https://en.wikipedia.org/wiki/Scarfolk for one example of many.
Addendum: Reply to deleted comment:
Ok, you're talking about the libel law part, writing a book that mischaracterises an actual person and inserts them within a fiction?
Well, Brass Eye went further .. it fabricated fictional stories and fooled real people into taking part.
https://en.wikipedia.org/wiki/Brass_Eye
Paedogeddon! takes the cake there. https://www.dailymotion.com/video/x5bg85g
https://en.wikipedia.org/wiki/Paedogeddon