If your site requires JS, not bothering to tell people just shows how much you (don't) care about your users. It's interesting you bring up facebook. I'm not a facebook user, but on I whim I just went there and what's the first thing they told me:
Sign Up
It's free and anyone can join
Javascript is disabled on your browser.
Please enable JavaScript on your browser or
upgrade to a Javascript-capable browser to
register for Facebook.
That tells me that the people at FB care enough about my time and theirs to tell me their requirements before I use the site.
Comments
If your site requires JS, not bothering to tell people just shows how much you (don't) care about your users. It's interesting you bring up facebook. I'm not a facebook user, but on I whim I just went there and what's the first thing they told me:
That tells me that the people at FB care enough about my time and theirs to tell me their requirements before I use the site.