This website's background color is considered harmful, and "considered harmful" essays are considered harmful.
Perhaps they're merely unaware of how their website looks?
In this case, considering the topic, such a complaint is really warranted. A set of sensible defaults for that blog would have made it more readable — the blog design is pretty much a rebuttal of the content.
1: https://homepages.cwi.nl/~storm/teaching/reader/Dijkstra68.p... 2: https://meyerweb.com/eric/comment/chech.html 3: https://en.wikipedia.org/wiki/Considered_harmful
Edsger Dijkstra's original title was "A Case Against the Goto Statement". Niklaus Wirth was editor of the Communications of the ACM (Association for Computing Machinery) at the time and changed the title to the now infamous "Go To Statement Considered Harmful".