the security risk argument doesn't make sense. Numerous social media and forum sites support HTML and they don't seem particularly prone to security issues.

Whenever I'm so substantively shaky or incoherent as to make my case unpersuasively the first time around, I figure I should live with the consequences. And whenever I find criticism flawed, I figure readers — perceptive as they are — will see the flaw as well, therefore there's no need for me to rub it in.