[icantthinkofone]

Invalid markup means you are relying on the browser to read your intent or your mind. They are very good at doing that but no self-respecting web developer would ever do such an insane thing as your example.

EDIT: Interesting about the downvotes. It shows a total lack of understanding the fundamentals of how browsers work but, alas, downvote away.

[wantab]

Don't feel bad. HN has turned into a political, anti-government step up from Reddit. But a step up from Reddit is no compliment.

[adventured]

You're being downvoted because of your argument from intimidation ("no self-respecting web developer...") and your wording ("such an insane thing"), not due to a lack of understanding browsers.

[icantthinkofone]

So don't tell the truth? It's interesting that people on Hacker News are intimidated so easily when confronted with such things.