I highly doubt secretly editing a comment of another user is one of his account's listed privledges. Not marked edited, I highly doubt its a built-in feature of the website for even administrators. What if a low level employee, who doesn't even have privilege to ban users, had leveraged his technical back-end access to their databases to alter a comment. Act as the person who made the original comment, effectively impersonating them by using their technical access to reddit's data to basically 'hack' that users account. I highly doubt this is 'within his rights' as a founder, as someone here commented...