Yes they are looking into it and heard they are banning cyptocurrency ads on their platform...
Can't wait if the will produce their own coin and maybe there won't be public ICO instead a Private ICO like telegram and many people get scammed on Telegram ICO.
FB often bans even simple ads without any reasoning. So crypto banning doesn't surprise me at all.
There's much rumour about telegram ICO. Durov hasn't announced it yet. But there are many scam ICOs already who pretend to be official telegram ICO.