In the specific context of Facebook ad targeting, reports and investigations concluded that it was used as a propaganda channel in the US by foreign national ag

In the specific context of Facebook ad targeting, reports and investigations concluded that it was used as a propaganda channel in the US by foreign national agents attempting to tip the scales in the US Presidential election in 2016. "Why is that a bad thing" or "Why is that Facebook's problem" is a reasonable question, but it won't be seen as popular in the US if Facebook accepts those questions publicly as its business attitude.