Can we report a fraudster by their bitcoin wallet address? I was recently notified by a friend that someone sent her a message (posing as me) on an app asking her to send them some bitcoin so they could make a purchase. Luckily she knew it was not me and let me know right away. I am trying everything to figure out where they swiped my picture from. Since obviously their account is fraudulent, I was wondering if there was at least someone I can report their bitcoin wallet address as being used for fraud? It may not help me, as Im sure the damage is done with them using my picture for a fraud account, but Im hoping maybe this will help to stop them or somehow make it catch up to them
Nope, sorry, there's no way to do this.  The whole point of Bitcoin is it's censorship resistant, so there's no way to publicly blacklist addresses (although some exchanges have been known to spy on your incoming and outgoing transactions, such as Coinbase which have a TOS that prohibits it, and will threaten to close an account if you send transactions straight to/from a gambling site: https://www.coinbase.com/legal/user_agreement?locale=en).  

Plus the user is probably using a new address each time, since you can generate as many as you like there's no need to reuse it.