No this is not something to respect someone for. This is unprofessional and a liability; if anything Yishan said wasn't documented and documented really well the OP has a libel case. It doesn't even matter how true it was.
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.