So, Russian authorities are going to label Meta an “extremist organization” and if one participates in such organization, f.e. has an account on Facebook, then it's a crime. Fcking brilliant.
It is more complicated. It is not exactly rule of law in Russia. If you are accused of overthrowing the government, having a page on Facebook, which is extremist organization, might be considered aggravating factor.
My source is the definition of an extremist organization. If you don't get that, you are ignorant. And based on what you cite KP(LMAO) you aren't just ignorant, you are delusional.