Well, I can't speak for David as to why he called the forum the Wilkerson Times. To tell you the truth, I've always thought it a goofy name.
But, anyways, we tend to infer information that we don't know for sure, because a lot of, for one reason or another, look at MITM as more than the sitcom that it is. We try and look at it more deeply, and for that reason infer certain things. Like Hal does something in business. They must have some sort of last name; Wilkerson is the only clue we've ever been given. I created an entire timeline tha began in December of 1999, a month before the show, which I use to infer more about the lives of the characters than we're shown. We had one member who created a family tree, inferring where other family members went on the tree from hints or tidbits of information. So it's not that we are abusing Mr. Boomer's wishes; on the contrary, we're expressing our appreciation for the show to a greater degree by inferring things to make the family seem more real.