I recall reading that a celebrity in the US discovered people were faking her images and attempted to sue them for defamation or something similar and eventually lost out as while the images were appropriate they were considered fictional and not inflicting negativity on her etc etc.
Plus I've seen so so so so so many fakes that I wouldn't worry about getting in trouble. It's only if you tried making money from it or offing it as real then you might be in a spot of bother...