What does this have to do with Facebook? Anyone can take a picture and share it without your consent.
Privacy controls were changing.
Posting to groups is slightly trickier than it needs to be. (I only ever post photos to public or to a single group, but selecting that group takes a couple of clicks).
While I can agree that these problems are not exclusive to Facebook I am far more likely to have the problem on Facebook than other networks because of the sheer size of the FB userbase.
No, that behavior has existed since newspapers started printing pictures. You touch on your real problem with Facebook, and that is its size. That's it.
There's the saying, "Quantity has a quality all its own." Turning a thing from an "occasionally" into an "always" can effectively change the nature of the thing entirely.
That's the internet's responsibility.
What, before Facebook you never showed up in your friends' photo album? Or your friends just never let anyone see their photo album? Because I know neither of those were true for me.