You must be hiding the artist in your closet then, since even your art with 'different' styles still has similar traits to others done by..that hidden artist somewhere...who is so well known you don't need to know where they are. Maybe it takes an actual artist to see consistencies in someone else's work, but I'd sure hope not! I'd hope anyone could see that.

I can understand someone wanted to protect artwork that's been stolen from elsewhere, but unless they can actually prove it they're just being rude. If it were me I probably would have become awful and gotten snarky about that art degree you have having to be worth something, if not the right to vary your art style.