Original sentence: Actions of pre-emptive self-defence against possible crime are discouraged; also, civilians can not perform a citizen's arrest.In Britain the law requires citizens acting in self-defence  to use "reasonable force" which leads to Guardian Angel training to centre around the minimum use of possibile force necessary only to prevent a dangerous situation from escalating.In London, the Guardian Angels are a much smaller group, but have been patrolling the tube system and streets since 1989.The organization was founded in New York City in 1979 by Curtis Sliwa, a McDonald's manager and community activist
Edited sentence: Actions of "pre-emptive" self-defence against "possible crime"; neither can civilians perform a "citizen's arrest".In Britain the law requires citizens acting in self-defence  to use "reasonable force".In London the Guardian Angels number very few, but have been patrolling the tube system and streets since 1989.The eventual fate of guardian angels in Japan will also show if Michael Moore's assumption (stated in his movie Bowling for Columbine) is true:  Will the strategy of a minority constantly stoking fears of imaginary crimes eventually result in the majority being afraid of crimes and finally supporting countermeasures suggested by that minority.which leads to Guardian Angel training to centre around the minimum use of possibile force necessary only to prevent a dangerous situation from escalating