Cryptocurrency Fraud

Hey all,

I recently have been researching scams and fraud in cryptocurrency, mainly focusing on client side fraud (meaning when the end user is attacked) - such as phishing (fake exchanges, ICOs), wallet theft malware, wallet switching malware and other scams.
Every now and then we read about this in the media or around social media - Phishing campaign stealing millions USD worth of BTC from fake exchange site, cryptoshuffler stealing $150,000 by switching wallet addresses and more.

Can anybody who has gone through such an experience or knows someone who has, whether defrauded or not, shed some light on this scene?
Like how did it happen? How much money was stolen if at all? When did you notice it happened?

This will really help us make our new crypto security chrome extension (CryptoFence) even better - our goal is to add as much features as possible to secure the crypto space from scams and fraud.

Thanks guys