To answer your question is i think both technology change us and expose us, it really depends on the person. The same applies for smart phones and the example is that if i just use the technology to help myself do some calculation faster, learn about the weather, communicate with some friends that live far from me, use tech in my work to make it simpler and better both for my sake and my company's then it's just change us for the better. Now if i overuse the tech by literally doing everything with it then probably i am changing myself for the worst.
If we upload images of our social and in general our life then pretty much we expose themselves, the choice still remains within us on what to do so if we wanna blame someone let's start from ourselves