Exactly.
That said, Facebook could be better with very small updates to catch paid propaganda.
I am Swedish, a country with a small population close to Russia. On public people's open FB accounts you will often find a lot of comments with very unusual opinions in Sweden, writing exactly the same thing as Putin's media.
The way to identify these accounts is to see if they can write anything negative about Putin. I typically write: "Do you condemn Putin for starting wars for territory in Europe again, like Hitler and Stalin in the 30s?". If they can't, it is overwhelmingly likely that is someone working in St Petersburg -- even most Swedish old style communists get upset by that.
Sorry for the rant, this is irritating.
Edit: On second consideration, it was quite a while since I saw these accounts? Maybe FB started doing exactly that.