I think there is a fourth portion that is probably more important:

Actively ignoring harm caused by your product. TV/radio has sold attention, but there were pretty strict rules on what you can/can't broadcast, and to whom. (ignoring cable for the moment) Its the same for services, things that knowingly encourage damaging behaviours are liable for prosecution.

Except cable is the more apt comparison here - broadcast rules exist because airwaves are an extremely finite resource and so we can argue that the government has a vested interest in what kind of speech can happen on them. No such scarcity exists with web services.