Following the rules of English is solely the writer's responsibility.

It seems to me you have a moral theory that people should have to work hard, and be punished for failing to conform to convention, even though, if you want to read it a particular way you could solve that in software without bothering me. If it's a convention here in particular, as I was told, then software support could be added to the website instead of used by individual readers. You're irrationally objecting to dissident or "lazy" behavior on principle, and you don't want to solve the problem in a way which is nicer people you think should be forced to change. This is an intolerant and illiberal view.

Your plan of inferring whether I proofread, or whether I am fluent with English, from my use or not of capitalization, is rather flawed. I often proofread and don't edit capitalization. But you don't care about that. The important thing to you is the moral issue, not that your semi-factual arguments are false.