Very juvenile and unprofessional way of dealing with the situation, really erodes trust in the platform (simply deleting the comment would have been a better response).
Would maybe expect this from the founder of a young fledgling startup, but the 33 year old CEO of a company like Reddit ought to know better.
It is much more honest and within reason to take steps like deleting posts, suspending or even outright banning users.
These platforms are not just a playground anymore. Politicians come on and make on-the-record statements on them, the news sources stories off them, etc. Integrity of the record is critical. Reddit jeopardizing that platform is very bad for them and erodes their credibility enormously. I can see major figures declining to perform AMAs anymore based on the uncertainty that someone at the company will get triggered, jump in, and change their stuff.