By all means, report your accessibility problems with sites on HN... to the site owner. Email is a good first move!
Also, it is an interesting question. Why do we keep seeing blog designs with thin gray text, even though people repeatedly complain about it, and even though text is the centerpiece of a blog? Its not really that difficult to pick a different weight or color. So what causes this problem again and again?
Is it really the case that the rule says "We don't want to hear about accessibility problems because they are boring"? That's just awful.
If they are truly "boring" and that's the only problem, why not let the downvotes take care of it? Why flag?
If the answer is "that's the kind of community we would like to create" let me just point out my third paragraph again and say that that's trully sad.
I hope you re-asses this...
It does, there are lots of mod comments about cases exactly like this. The problem with these is not that accessibility is unimportant or unreadable pages aren't annoying but that they're repetitive.
With a little bit of search, looks like the reader mode extension does what I want (in fewer step)