Earlier quoted context omitted.
Relevant context: https://np.reddit.com/r/IAmA/comments/2iea97/i_am_a_former_r... From the NYT: "That incident, according to people close to the company, made some of Reddit’s current employees uncomfortable."
He was being honest and I actually respect him more for putting a former employee that obviously was trying to get sympathy from the Reddit community, in his place.
He also publicly spoke out about someone's work ethic and performance of which we're only getting one side of the story anyway. If his real name is associated with his reddit profile then future employers will see the CEO of a public internet company lambasting him. Whether it's deserved or not at the time is irrelevant; there are plenty of people who, for one reason or another, do terrible at a job and later are highly valued. This could ruin any attempt at redemption.