Just to add: frankly, I wouldn’t put ADHD/ADD in the “mental illness” category. Having the disorder doesn’t make you unstable, or incapable of determining reality, or any other debilitating mental state. Certainly there is (in my experience) no aspect of ADHD that makes suicide or self-harm more likely, and none of the more-established medications used in treating the condition enhance the likelihood of such thoughts.
This meme will then be used to deny guns to those most capable to use them responsibly.
After all, what dictator wants trained, disciplined and armed men in the populace?
Bad for the Dear Leader's health, don't cha' know.