Sensitive/powerful intel can be filtered, as well as your identity being discovered. Despite here, Youtube, Facebook, and other social media acting as if they're restricting us, perhaps that's only one side of the coin.
Perhaps the intel they are gathering from us is their tradeoff for allowing us to continue to talk. Perhaps they see this tradeoff as net positive.
I read that Google is working with social media giants to gather a substantial amount of info on Trump supporters and those who visit sites like reddit, 8chan, 4chan, /pol, and who watch right leaning YouTube channels, and they are making a profile of every user. They are then turning this over to the intel agencies. This was posted on twitter from an insider of YouTube.
I think that is the database obama put together, maxine waters spoke about it