If it's on the internet already it went out of intimacy, no?
Not sure, if it is assumed it is private.
I agree with the responsibility, but unfortunately that also requires the knowledge - and there is so much automation and complexity, I am not sure if even the above average can adequately handle it.
I, for one, I lack the knowledge of what is private and what is not. And how private exactly. I just assume the worst and it doesn't bother me. I also tend to calm myself with the No One Cares thought.
Ads have not bothered me unless they obstruct the use of the site itself. I like studying ads. And I might click on 1 % of those and even find them useful...at random. It's my job to filter what I need or don't, I don't expect the net to protect me from unwanted info. Then again, it's important to understand oneself in order to have the best behavior (for oneself), ads influenced or not.