I spent much of my teenage years playing video games, building/overclocking computers, flashing roms on my phones, and devouring wikipedia. my parents were concerned that I was spending too much time online but I'm glad they didn't try to intervene. I was learning tons and by the time I got to college pretty much everything in the CS degree was trivially easy for me (except some of the formal math stuff).
on the flip side, I am quite certain that most of my peers spent their hours primarily on youtube, facebook, and aim. they seemed to take pride in how little they understood the workings of their entertainment devices.
today I hear a lot of parents talking about how they are putting off getting a family computer/tablet for as long as possible and how they intend to severely limit screen time once they finally get one. it makes me sad to think that these children will miss out on all the great learning experiences I had with my computers, but I'm not sure the parents are necessarily wrong, especially with the current buzz around social media and mental health.