Email of the day: How should I respond?

Time for a little group participation. Earlier this month I detailed Bernstein analyst Jeffrey Lindsay's theory that YouTube could make money by charging for uploads. The general idea was to make YouTube more professionals.

I received a few emails about the concept, but this one has me a bit stumped. The email subject was "Not a death threat," which I found so comforting I just had to open. Unfortunately, I'm not sure how to respond to this so I'm taking suggestions. Best reply from the talkbacks will be used. Here's the letter:

I assume you have received enough death threats from people over your article encouraging (or pasing on Lindsay's encouragement) for YouTube to completely DISMANTLE ITSELF in favor of creating a TOTALLY DIFFERENT entity by charging for uploads.  The idea is born of a feeble mind, perhaps on drugs, perhaps lacking proper nutrition and/or sleep.  Whatever the reason for your lapse in reason, I wish you a quick recovery and I hope you will apologize for that embarrassment.  I have nothing mean-spirited or evil to wish upon you.  No death threat.  Just my sympathy for your seeming to have gone absolutley nuts, forgetting that YouTube was created to give EVERYONE with a computer and internet access the means of exposure that otherwise only people like yourself are afforded.  Even silly mouse videos have their place on YouTube which is what makes it what it is, a true public forum.  Google is a big enough company to be able to afford a "lost leader", if YT truly is one.  But I have faith that they can come up with ways to keep YT free to use and still have it pay for itself somehow, some way that doesn't make it an exclusive tool of the well-to-do and their bratty spoiled kids.

How should I respond?