Regarding shieldfont, if a screen reader can get the real words, then AI scrapers will eventually be able to get them one way or the other... I stand by my points in the post. I guess I'd say if someone uses a lesser-known obfuscation technique that remains uncracked or unnoticed by the bots, then more power to them. But if and when everyone else catches on, it will become useless.
I am very proud of the theme, which originally started out as a bearblog theme but I think by now it's all been replaced with my own CSS. The light color theme consists of the Windows web colors, while the dark theme is modified from the CGA 16-color palette.
I appreciate the feedback from people in this thread. I realize the irony of the blog not necessarily conforming to the ideal of an accessible format, but it's all in plain text and shouldn't be too much trouble for any reader-mode or accessibility tool to parse... I was aware the dark theme needed some more contrast. I just tightened it up a bit by darkening the gray palette value.