With the controversy over the illegal data gathering of Facebook and Cambridge Analytica, and of course the abuse of it by the latter, Bloomberg has a nice bit of reporting on an not-so-underground scammer conference. Read how exactly this underbelly of big data advertising works. As a conference attendee notes:
They [Facebook] go out and find the morons for me.
Update: Even more reasons not to have any social media presence: a Guardian journalist shows in detail what was collected about him.