Ahhh see what you mean.
Although here the gangs are slightly different, they cant be seen or spoken too, but there are routes to complain or be heard threw
also the gang members are a little more for the people than against them, (example) If a home is broken into by the so called unrulely boys,or just boys who have nothing to do but cause problems, then a gang could arrive at your door unanounced and ask if you require any assistance or If you have an idea of who might have carried out the burglary, if you push the issue, then all items that was taken are normally returned by a gang member and the affender is punished severly.