Unfortunately, lots of people don't cite news articles at all. They just post memes.

But for people who do want to post a news article, it seems like there are lots of workarounds, like quoting and citing, or an indirect link through Twitter.

It will be a question of how smart Facebook is about blocking stuff. I'd guess they wouldn't be any smarter than they have to be to maintain plausible deniability.

If you get your news from Facebook, you’re doing it wrong.

Reddit.