> As other have mentioned, I think however plausible that conception of speech was then, it's utterly ignorant of the problems we're facing today

I think it is the exact opposite. Maybe I have read too many dystopian novels like fahrenheit 451, or 1984, or read too much about Chinese govt's control of its population, but I feel that modern technology has allowed too much censorship power in hands of not just the govt, but a few corporations. And it is extremely important that we do not compromise on free speech now.