If you were to log in, you'd be able to get more information on your fellow community member.
The part about people's misuse of HTML is on-target, but the bashing of HTML itself strikes a sour note. The reason for the WWW's popularity is precisely the laxity and imperfection in HTML as opposed to SGML. It provides a low barrier to entry for the hobbyist or non-technical person. Someone feeding comma-separated lists into a database would not sustain their interest long enough to put their accumulated knowledge online. Someone doing "Save As" and finding some specialized tag set would not be able to transfer that coding to their own web page on a different topic. If browser writers had to validate and reject all non-conforming documents we'd still be on Netscape 1.0 and nobody without a CS or engineering degree would have a home page. I've observed many struggle with SGML -- waiting 1/2 hour for a document to validate, abandoning WYSIWYG editors in favour of Notepad, typing verbose tags to convey meaningless distinctions -- this is not the kind of thing that could or sh...
You are causing thousands or tens of thousands of users to be led into an ugly 404 Not Found screen.
A great way to do this is to get a URL published in a magazine. I had the URL http://www.interlog.com/~john13/vcoach/vcoach.htm published and about 10% of the readers typed it in wrong (including some very creative spellings). Makes you realize how important it is to make URLs pronounceable and easily spellable.