It sounds bad for someone to have a "disorder" that includes the word "deficit". Just those two words are negative The truth is that people with ADD or ADHD are not lacking as people but are very bright and creative. It is hard to pay attention in the way that most people do and it is hard to control the impulse to blurt something out. . People are very intolerant of the ADHD person interrupting them when they are speaking. They think that the ADHD person is being rude when the truth is that it is very difficult, if not impossible, to not interrupt others. This behavior is improved by taking medication but who wants to be medicated every waking hour of the day?
Some of the discrimination include being called names like ugly, fool and coward. They are taken to be so different from the regular kids, most especially in school. Regular kids never want to associate with them because they find them weird and not social.