I don't get it, the first time I heard this, I thought it was some big joke, but there really are ppl with js turned off? In 2015? Don't you need it to sign into anything... like HN? Or post a comment.
But that's 15 minutes of my life I won't get back, and alot more if I was to start whitelisting sites (which at this rate, would be every site I visit) and wearing a tin foil on my head, just saying... (<-- light hearted joke for the too religious :)
But no, JavaScript is not required to sign in (that's what HTTP Basic and Digest authentication are for), nor to post comments (that's what the HTTP POST method is for); both capabilities are available to a non-JavaScript browser.