Ha ha... and before that... well, read Plato's Republic. The youth of his day were being ruined by the pan pipes, and by the baudier passages of Homer! And some of the early Greeks claimed that literacy was ruining youth because they could write things down, rather than committing things to memory.
Face it, most gamers exchange television time for game time, because gaming is more engaging. The real divide is between active and passive--between television and other activities. It turns out that kids who play video games are as likely to go out and play other games. I love video games too, so much that I was a game developer for 15 years, but on a beautiful sunny day, I have to get out and cycle, run, walk, read a book under a tree, or if there's a lake nearby, swim, paddle a canoe, or sail. If I don't exercise at least an hour a day, I feel slovenly, and I can't sleep well.
But the main divide that Zimbardo and Duncan pay no attention to is between extraverts and introverts. Introverts are viewed with suspicion by our salesman society; we're pathetic broken losers. We should be out pressing the flesh, chatting people up, engaging in team sports (notice that all of the ones I engage in are solitary.) But because we don't, there is obviously something wrong with us. And so, they go in search of the reason we are so pathological.
By the way, video games must be pathological, because they're NEW!
Porn isn't new. And many of the most successful pickup artists I've ever met had huge porn collections. Frankly, the difference I noted between guys who got laid a lot and those who didn't was that the good pickup artists were much more callous, more manipulative, and used women like sex toys. But never mind, that's a sign of maturity. Or maybe women are just as immature as men. This is nothing new, either. Feminism was supposed to address this, but so far, it hasn't made a dent.
Nor do they notice the trend that has been going on for a century: in an age of increasing specialization, the gestation period for everyone, both men and women, is getting longer. The Bar Mitzvah is at 13--at one time, this is when you became a man, and you were ready to start a family then. A hundred years ago, few went to any school beyond what we would now consider elementary school: age 13 to 15. Then we went on to high school, age 17 to 20. Then college, age 21 to 23. Bachelor's Degrees, age 22 to 25. Now advanced degrees, age 25 to 30.
Material expectations are now also much greater. You must have a car, a house, a steady job, to raise children. And the strategy of parents is different; while my parents and earlier generations had as many children as possible, hoping that some would survive, most parents now wait and bet everything on one, two, or three, expecting them all to survive.
The world has changed. But the doomsayers have not.