The mechanisms of addiction and socialization are definitely more complex than "it made me do it". I'm not saying that without the internet I would have become World President, but the technology definitely nudged me towards indulging some of the worst traits in my character. It also allowed me to tolerate situations that, probably, I should not have tolerated - which feels good in the immediate but can actually postpone a necessary reckoning. And it heavily influenced my career choices, with mixed results.
> Maybe you might have spent too much time hanging out at your local bar? - Perhaps you'd have been addicted to television?
Maybe, but those are well-known behaviors, fairly easy to spot and compensate for. Bars are actually hypersocial and promote local connections and some degree of personal expression. TV is very passive and boring, whereas on the internet there is always something new to read or do.
It wasn't until the '80s that we got a fairly solid (and popular) understanding of the mechanisms of broadcasting, some 60 years since it had become mainstream; as you said, there are a lot of things we don't know about the new world of 24h online access. Undoubtedly my life choices are ultimately my fault, but "no man is an island" cuts both ways - particularly because I see a lot of my (bad) experiences replicated in a lot of my friends.