While some of it is boosting the abnormal behaviors of people suffering from mental illness, I think you’re making a false equivalency. Mental illness is not required to be an asshole. In fact, most Twitter assholes are probably not mentally ill. They lack ethics, they crave attention, they don’t care about the consequences of their actions. They may as well just be a random teenager, an ignorant and inconsiderate adult, etc., with no mental illness but also no scruples. Don’t discount the banality of evil.