I think what scriver is getting at is that Internet and Videogames provide an easily available slippery slope that allows bad problems to get worse. I've spent an awful lot of time navel gazing, trying to suss out the core of my personal problems, and why I was such a reclusive internet rat from almost the moment I had a computer with steady internet access, and the reasons can be summed up thusly:
-Absence of a father or father figure, and even worse, all potential male figures being idiots.
-Mother that was nigh-constantly emotionally unstable and violent; contributing to a lot of emotional trauma.
-Uprooted childhood, moving from one place to another, into communities that it was impossible to meld into.
I don't know you that well nenjin, but from the little personal stories you just told I'd imagine you didn't have it that bad growing up and thus got to be emotionally healthy for the most part. Emotionally healthy people can use the internet exactly as it was intended: as tools for information or enjoyment, and leaving it exactly at that. Emotionally unhealthy people, desperate for an escape from their lives, are given a means of egress that recedes infinitely into cyberspace.
This can easily lead to the sick person becoming entrenched in digital activities, not because they truly enjoy them but because they don't hurt; and while the internet can teach a lot, it can't teach the kind of complex social skills that only being face to face with other people can teach. Every second spent in front of the screen is a second spent feeding an illness rather than finding a cure.
So, to summarize, the internet doesn't create the problems, but it can makes them worse, all the more so because it seems like a harmless activity that keeps you off the streets and away from drugs, but it is that same seeming harmlessness that lets people get caught up in it for long, long periods of time.