Have you ever wondered what was purpose to founding some pages? To some it was sheer joy and promising idea. But life is like fairy-tale from Grimm brothers. Fairy-tale but pretty scary. Therefore, you cannot be surprised by Facebook anti Russia campaign.
Putin nation has really long claws and once you in you cannot flee. Disinformation is probably the best tool they pulled out yet. And the best society in this disinformation is so called Internet Research Agency which is based on really clever KGB ideas.
However, in no time there should be tool which will alarm you that page you are visiting is tied to Russian propaganda and therefore is likely to be not so true.