Just read Betosneck just made the same analogy (before me) about smoking.
And yeah, you're right, there's a behavioural element to social media as a means of control and influence that smoking doesn't attain (arguably at least).
I just mean looking at it in terms of a product that is damaging and how we might seek to control it.

"Product", "damaging" and "control" are obviously quite different meanings and ramifications depending on what you're talking about.