It's such a fine line to draw and a fine distinction because someone might find it insulting- which is not the case whatsoever. If anything, I think it's an amazing thing-- getting me to stare and double take, be inspired and interested in. I think it's boring if someone looks so plain and vanilla... I'm happy that such a great master could appreciate the people who are different because they're different; someone has to. Exploitive? Not in the least. If I were to draw or to paint images of anyone, I want them to be off the wall and unique, wouldn't you? It's more fun and it's more... real.
Not everyone is "beautiful", not everyone is pristine and like beautiful porcelain. The ones with rugged edges- the ones with cracks- they're the ones who will make the most interesting art.