Whenever Facebook updates something, such as notification settings or email, they do it silently. Every time this happens, posts about it will go circulating on news feeds for a couple of days, warning you. If you don’t catch it, it’s usually not the end of the world, but I’m sure sometimes it can be a big problem. So people complain.
But how bad is it, really, compared to how other companies would go about it?
What most companies would do is present you with pages and pages of legalese, that you would scroll down without reading, and click “I agree” at the bottom. Or they’d send you an email saying “we’ve updated some stuff, just FYI” and if you could be bothered to click and not delete the email immediately, you’d get a list of such changes, usually padded with heaps of boring text and/or legalese. Then you would complain.
I think the “Facebook is messing with your settings AGAIN” posts on the news feed are more effective, because instead of clicking “I agree”, you think, “god dammit Facebook” and read the thankfully concise info and change your settings. DONE.