_Neoshade_

So, 2% of people experience symptoms without having any diagnosis (presumably, they are unaware of their ADHD), which would be 40 people in a gymnasium of 2000.

My father had an enormous hornets’ nest in the wall of his house.
After various methods failed, he finally just taped the hose of the shop-vac over the entrance hole and left it running for 2-3 days. The vacuum was filled with a couple hundred hornets, and the suction seemed to wipe out the remainder.

There definitely might be a negative correlation between people who attend a public event and people with ADHD.

I have a friend who was in the music room during the Columbine shootings and has lead a somewhat troubled life since then. She's doing great for herself now, works with horses and is highly motivated and self-employed. But I don't think that she's ever sought counseling or spoken to anyone seriously about it. She's taken her own long road to healing. I think what you're doing is really great, and I think that you and her might be great resources for each other. PM me - I'd like to discuss putting you in touch.

I’m not sure you understand networking well enough to answer this question.