Know this sounds crazy, but we think you're right on all of them except Twitter and Snap.
Snap is actually built from the ground up based on maximizing your privacy, and their mgt has taken care to protect that (as much as a communications app can). It's also mainly fun, and is no more going to destroy the fabric of society than the telephone did (or the cellphone, own one of them?).
but look, we hear you, in the hands of certain people, some of this new social networking stuff is the destroyer of worlds. Look no further than all the gaming which occurs on Steemit. But Steemit isn't ALL BAD either, you can get good advice on investing thru Steemit sometimes, like this:
Good points indeed, thanks.