We are beset on all sides by the mentally ill. I have worked with them for many years now.
The rx drugs sometimes help, sometimes they make someone worse. Some refuse to take their meds, peiod. Here are some points to consider when trying to prove or posit the "myth" of mental illness: Virginia Tech, Daughmer, Hitler, the Manson family, the leaders of Iran, North Korea and indeed, America. The only realistic alternative to mental illness, is demon possession.