Generally, professionals will not involuntarily commit patients unless the threat is current and pretty explicit, though there are exceptions. Professionals can

Generally, professionals will not involuntarily commit patients unless the threat is current and pretty explicit, though there are exceptions. Professionals can involuntarily commit people for short periods of time for observation, to determine if they really are or are not a risk. For instance, if someone shows up in the ER with knife wounds on their wrists, that can warrant an observation period. Interactions with the police can lead to observation if the officer believes you to be mentally ill. It's a very fine line to walk between individual liberties and providing treatment to those who need it. If you're schizophrenic and you live on the streets, yell at birds all day, and eat from the garbage, you are not considered a danger to yourself, even though you have a pretty abysmal quality of life and are at serious risk of dying from disease, drugs, homicide, exposure, or starvation. It's a complicated conversation with no clear answers.