I posted on Ted Neward's failed analogy (in a post about O/R mapping) a week or so ago. Yesterday, at the party we had, a few of us were talking about this and that, and James McGovern's blog came up. One of my friends made an excellent point:

How can you take him seriously, when he posts the kind of silly, unrelated pictures he does?

Exactly. That's a large problem for his blog, and it's the same one Neward had in his post about O/R mapping. When an otherwise ancillary point overwhelms your message, you've failed in the basic task of communication. On McGovern's blog, most of the images he posts are political, and they are bound to irritate roughly half of his potential audience. A lot of the others are just pure nonsense images. In general, none of them have anything to do with the content of his posts.

Those images are like annoying popups - they detract from his message, and make it far less likely that his thoughts will be taken seriously.