Please! I suggest that Mr. Norvig wade through a vanilla Apache installation's httpd.conf in order to remove all the stupid and dangerous default settings that are in there.
Besides, what kind of HTML is Mr. Norvig referring to? Is it the one that Berners Lee has been dreaming of since the beginning of the nineties or the murky tag soup that we have to deal with nowadays? I guess Berners Lee left the sinking boat just in time to chase another dream: the semantic web.
The idiocy is a collective one I'm afraid. We're all to blame: standardization commitee members, browser/server implementors and webmasters. We made the web the chaotic place it is today. As such it simply mirrors the world around it. It's time that Norvig faces reality again. As far as Berners Lee is concerned I have given up all hopes. Semantic Web ... yeah, right!