What a bizarre bait and switch. Starts talking about browsers allowing malformed HTML and uses that to draw conclusions about allowing certain types of people.

You may be unfamiliar with metaphor, analogies, and other forms of rhetoric which have been in use since the Roman Empire.

I apologise, I should have signposted those more clearly. As you begin to read more widely, you'll discover many authors use popular rhetorical tricks like this to advance their arguments.

My god, and we thought those english teachers were idiots when they insisted we should learn things like reading comprehension and metaphors.