To this, add the fact that they collect so much data. The idea of a not only partisan, but partially mob-driven Silicon Valley is concerning.
Just think about psychometrics for a second. Facebook, based on your use of their site, can deduce enough about you to build a psychological profile of you. That was enough to correlate certain psychological profiles to political inclinations, and target marketing to potential Trump voters.
Those psychological profiles are only going to get more precise, as time goes on, to the point where you can predict someone's likelihood of getting addicted to alcohol, or becoming a serial killer, months before it happens. You think Facebook won't eventually make use of that, either forced by law enforcement, the mob, or of their own will? It's immoral not to do it, you'd be saving lives! But then, what else can be done with those profiles? Who gets to decide? Will the mob have been appeased by then? You better hope so.
Isn't Net Neutrality a political issue now?
http://www.dbms2.com/2017/02/02/theres-no-escape-from-politi...
-- Privacy/surveillance issues are huge in tech.
-- Immigration issues are a big deal, at least in the US.
-- Censorship is huge in many countries.
-- The internet is a key enabler of globalism.
-- Automation of jobs is a big deal.
Etc.
Silence is just tacit approval of the status quo. Acknowledging that tech companies have a political role is acknowledging responsibility.