Unsubscribing from any list should be easy, since unwanted email is annoying.
The unsubscribe mechanism you are using is part of Jokeaday.com, which distributes
the column. It almost always works. Occasionally, I don't know why, it doesn't.
You might be having firewall problems, or be trying to unsubscribe from an
email address other than the one you subscribed from. In this case the easiest
thing, if you use Internet Explorer, is to get the emailed column onscreen,
click on Message, then on Block Sender, whereupon you will never again see
my smiling face. Other browsers have similar mechanisms.