Diagnosed with schizophrenia, he is involved in the recovery approach in mental health and is an organizer within the psychiatric survivors movement.
In 1988, he became co-director of the Earth Island Institute's Environmental Project on Central America, and traveled to El Salvador and Nicaragua during the civil wars in those countries.
He spent a year in the public mental health system, including restraints, solitary confinement in a padded cell, and more than two months in locked wards at Langley Porter Psychiatric Institute.
[13] In 2001, he began speaking publicly about his mental health experiences, and with Oryx Cohen co-founded and did peer counseling at the Freedom Center in Northampton, a support, advocacy, and human rights activism community run by people with psychiatric diagnoses.
[20] Hall has worked as a consultant for Mental Disability Rights International in Mexico and Argentina; has taught at Sigmund Freud University in Vienna, Austria and Ljubljana, Slovenia; and has given talks and trainings in more than 35 countries.