Why do some guys do this?

Isabella💋 • 20. Musician. Beauty Vlogger.
I deal with a lot of crazy messages sometimes, but this one just makes me laugh. I was called a fake from someone I've never even spoken to before and he started asking for picture proof, definitely the wrong kind of proof. I'm sure a lot of you ladies have had to deal with this at least once in your life or will in the future! If you have, how did you handle it or did you just ignore/block the person?