For a while it blocked me from the News Feed because I didn't accept their new GDPR policy, but could still send Messages to other friends. After a while I discovered I could use the News Feed and never saw the GDPR page again.

I hope they aren't claiming that I accepted it. I guess it's their word against mine, no way to prove that I didn't click the button if they just flip a bit in their database.

I just rarely use it for Messages now, no News Feed.