Regarding [2] This is extremely bad, like Google+ forced-real-name-policies bad..!
(For those who wonder: that and the Buzz incident made lots of people hate or at least distrust Google.)
Why why why do companies do this?
During the last 6 months I've stopped logging into Stack Overflow. It is a nice resource but for me it is read only for now because they messed up so hard - and refused to come up with a real apology.
Same goes for Quora: they betrayed us hard by trying to tell everyone what we were looking at. (Edit: next sentence added later:) Now imagine you've been reading up about health issues and realize it is suddenly on your profile. Still now, many years later I shun them as they haven't as far as I see come clean.
In some cases, if it get caught early enough, just saying: "we messed up, sorry, here's what we will do:" can be enough.
In other cases - where there are layers of bad patterns, lies and contempt for users and volunteers I actively want to punish them until they start behaving.
Quora (broadcasting sensitive information), Google (trying to kill the web, insulting me with insanely misplaced ads for years, trying to kill Firefox), Stack Overflow all goes on my list of companies that I actively work against, but I guess only until I see real change ;-)