Google is in the news again for firing an employee for the thought crime of writing a memo criticizing Google's "diversity" policies.
This is not unexpected, as Google routinely bans, or makes unsearchable, or unmonetizable, politically incorrect accounts, blogger blogs (including this one, which has been deleted when an associated gmail address was suspended for months - and when de-suspended all blogs were deleted), and YouTube accounts.
FaceBook behaves similarly.
Most recently FaceBook has banned advertising from the libertarian movie review website MissLiberty.
The proprietor of Miss Liberty, who wishes to remain anonymous, often advertises the website and its associated FaceBook page on FaceBook.
Most recently MissLiberty has had a number of targeted ads about movies on totalitarianism or movies of interest to Latin Americans, which had been targeted to Venezuelan FaceBook users.