Just blocked and reported the accounts! This is a huge violation of the rules and if you find out who it is you can sue him/her and it will have some serious problems with the law! You can try even without knowing who is because that's a theft of identity and it's very serious!!!
Thank you so much for helping us take them down!! That's an interesting point about identity theft. I hadn't really considered a lot of legal action because I probably have 20 fake accounts on instagram already... it's like a game of wack a mole trying to get them reported. I've just never seen someone operating at this large of a scale ...