A behavior modification system for deterring an individual from approaching a body includes: a bracelet worn by the individual and including a bracelet controller, an antenna in communication with the bracelet controller, an alert component in communication with the bracelet controller; a base unit including an antenna, a base speaker, and a controller in communication with the base speaker and antenna, the base unit configured to broadcast a predetermined caution zone around a proximity of the base unit. When the controller of the bracelet determines that the bracelet is located within the proximity of the base unit based on a signal received from the base unit on the bracelet, the alert component generates an alert to the wearer of the bracelet, the alert including one or more of arrhythmic vibrations and audible sounds that are unpleasant to an individual with ASD.