If we locked up everyone who "looked crazy" then basically everyone who was willing to stand in line for chicken tenders in Market Square deserves to be marched over to the jail, friend.

"Sanpaku gan" as someone posted earlier, explains it ALL. "According to Chinese/Japanese medical [3] face reading, when the white part of the eye, known as the sclera, is visible beneath the iris, it represents physical imbalance in the body and is claimed to be present in alcoholics, drug addicts, and people who over-consume sugar or grain.[4] Conversely, when the upper sclera is visible it is said to be an indication of mental imbalance in people such as psychotics, murderers, and anyone rageful. In either condition, it is believed that these people attract accidents and violence.[2]". So you're not wrong in reading this psycho's face; I'd cross the street if I saw any mofo looking that unhinged.