No. I have four kids, and I've been watching them. The ones who are already PREDISPOSED to be agitated and energetic can be pushed in that direction easily. The ones who aren't... don't. This indicates the problem isn't "videogames" or "D&D", or anything else outside of the person. It's something to do with THE PERSON IN QUESTION.
Of course, it's so much easier to talk about blaming some other innocuous but eyecatching activity, rather than address the real issue, which is that people who have various mental problems -- large and small -- generally can't get them treated under the current system because they don't have the money to pay for it or the support to convince them to go do it and KEEP doing it (even if you have a condition that's treatable with drugs, it's not just a matter of finding the drug and everything's happy-ever-after; you have to monitor the dosage, observe changes over time, etc.).