Out of frustration by what they saw as out-of-control criminal activity on the Beach, local activists Michael DeFilippi and John Deutzman formed the Miami Beach Crime Prevention & Awareness group on Facebook. The fledgling group has quickly become influential: City commissioners and state representatives have joined and praised its work. Police officers have made arrests based on DeFilippi’s sometimes sketchy tips. But controversy has been building around some of the group’s attitudes and tactics. Follow DeFilippi and Deutzman on South Beach as they explain why they formed the group.