It is sad for those involved, but the fact is that unless you are involved in these gangs in some way you really aren’t at risk. The most vulnerable at risk are young black teens / rising teens on specific estates where many join because it is the way to protect themselves. Families with ‘at risk’ boys on high risk estates often move if they can . It is for them that I most want the gang issues sorted out.
But if you do not live on a particular estate and are not an at risk demographic, it isn’t a problem.
We lived between 2 estates that had gang activity, my Dc knew (but were certainly not friends with the one who was also a perpetrator ) two boys from their school who got stabbed , one fatally. And the mother of one of those boys (who was a good lad who got caught up protecting others) had tried repeatedly to move. But they and their (very diverse ) group of friends had happy independent social lives, and did very well at school.
Street wise: walk away from trouble (at the first sign) , don’t look at people, don’t stare, don’t go around be-decked in expensive street-favoured clothes and accessories.
I walked freely through the estates without bother: way beyond the radar / interest of any criminal activity, being not a customer for drugs, a rival dealer, or wearing a desired puffa coat, watch or trainers.
It is a serious problem for those who can’t escape being at risk. But the fact is that unless you are at risk it isn’t much of a risk at all.
London has a residential population of millions. You don’t see all those ordinary lives in the media.