Question: is his behavior angry or disruptive? Or just inappropriate?

I have ADHD to where I am highly inattentive and hyperactive, however my hyperactivity mostly is translated with anxiety. However my brother is more of the old school poster child of hyperactive (he is GO GO GO) and had a lot of trouble socially in your guys regard.

The thing is, ADHD can come in many flavors. And I know a lot of people and children with ADHD who have social problems that exhibit in inappropriate comments and even other behaviors. However they are not necessarily defiant but are socially behind of their peers, and with their ADHD it is more difficult to hide.

I believe counseling is a good idea. There are doctors/counselors/behavioral therapists that dedicate their lives to ADHD and other similar disorders like Asperger's/Autism (even specifically for adults with those disorders).

Good luck to you and your guy

Sweets