I don't know, I'm not too worried. Currently the people in their 20's were probably raised on video games and they seem to be doing just fine (look at all of the people starting companies and doing cool stuff). I would argue that as a parent you can point to many things that are corrupting your children, and this has been the case since America was founded, if not long before.

Basically, If your kid is playing too much farmville, turn off the internet and kick them outside. It is as you say, when you are young, you need to experience everything, even causing trouble.