How 'bout adding an "Ignore Poster" button.
That would require mandatory registration if it were to be at all effective. And that's something I won't do. Mandatory registration is a good way to filter out a large percentage of trash, but you also lose a lot of good content in the process. Many of the best questions are asked by curious passers-by, who would not otherwise ask if they had been required to register, first.
From a technical standpoint, it's nearly impossible to write a script that would allow you to filter a specific non-registered guest. The two identifying factors -- guest name and IP address -- are both extremely unreliable. A guest can choose whichever name he likes, and change it each and every time he posts a message. Two or more guests can post a message under the same name, and I can think of no better example of this than the name "Anonymous". IP addresses can be easily masked, and are often rotated periodically by ISP's. So the only way to make an effective blocking tool is by requiring all participants to assume an identity through user registration. And as I said, that's not an option I'm willing to use.
Besides, it looks like the current problem with Don & Anonymous was stamped out almost entirely in one swoop. This is the only live thread remaining that has the same annoying qualities. So once Anonymous gets his last word in, insetad of answering, just let it go. And with any luck, this will all go away.
Regards,
Jonathan