Failed at finding fails
You'd think if someone wanted to write an attack piece they'd at least research it and find out "What was the worst event that best illustrated what can go wrong?" These are mere bon-mots.
Eventually found out to be a stock market 'expert' who had been guarding against the concept of "naked short selling". It wasn't the sock puppets or the long-time sneaky edits to protect his articles, it was the way in which he was able to co-opt WP establishment figures to defend him. Years went by, with multiple other users blocked, but defended by luminaries he continued. Most definitely including Wales himself, who knew the user personally.
It was only when several people accumulated inconvertible, though circumstantial, evidence of exactly who the editor was and what he had done, that the majority of users overwhelmingly forced the PTB to ban the user. Unfortunately because of the initial acrimonious dismissal of obvious facts by those powers, several users quit in shock and dismay. Wikipedia's best defenders were pilloried and rejected by Wikipedia!
It is this episode that best illustrates Wikipedia's greatest vulnerability - people can be played. (*and* the second greatest - failures are swept under the rug).
The author here has failed at this assignment, having only amputated a few of JW's toes and quite failed at a head shot.