I think you missed the point. Kids have been kids forever. Kids with ADHD have presumably also been around forever, and seemingly they make up perhaps as much as 1 in 10 kids. Is it ADHD causing these kids to "act out" or the unreasonable expectations of our modern, industrialized and highly regimented school system that's part of the problem? The school system as it exists suits some (perhaps a slim majority of kids, by some measure), at least to the extent that it creates a population of obedient students, but does it suit everybody? And is the solution to ADHD to simply smash the kids who are unable to be cogs in the machine as it exists today into the shape of cogs that do or is it to change the machine so that kids of all types can learn and succeed?

You point to the "worst" examples of problem children with ADHD but you miss the fact that the majority are nothing like that, you also miss the fact that their issues are hugely exacerbated by a system that does not work for them, does not care about them, and a society that does not prepare them with the coping skills necessary to deal with their issues.