Buy my third child is showing signs of ADHD, and I have nothing but compassion for him. I have no interest in OVER medicating him, and have made significant life changes so that I can take my younger children on as many outdoor activities as possible.
In short... overmedication might be an issue. Not having good life-coping skills might be an issue as well. But sensationalist headlines that let headline browsers reinforce their "ADHD doesn't exist" misconceptions can cause harm. Just because it's a recent discovery doesn't mean that it isn't real, and that we can just abandon these kids.