It seems like the situation of Facebook-anger today involves some people looking at particular interface of details that allegedly make Facebook in particular "more addictive" than email (or whatever unspecified social activity) but with this group with this narrow critique being joined by those with a broader critique of social media that essentially calls for nothing but face-to-face contact.
We face a difficult question of "at what point is a communication medium a tool of its users and at what point does a communication medium merely act on the users without them being truly conscious agents". I don't think we can really address this question by demonizing Facebook (the problem has existed since the dawn of mass media, with nearly all these media forms accused of doing terrible things and with the accusations at least have some support). Just for example, Zuckerberg may indeed have made some terrible choices but Facebook seems to signal a desire to take on this difficult question.