I also have a similar experience, I was mugged at knife point and spit on by two adolescents. After that I was jumpy around groups of teens.
That said , I do not think my fear of teens was rational, neither was it healthy. Only a small minority of teens will mug people. Fearing a whole group for the actions of the few is in human nature, but it is something we must fight against.
I mean what is the end goal if women are in fear of men ? You can probably reduce violent crime even more, but it remains a rare event. Only 31 out of 1000 people were victims of a violent crime in the UK in 2010. If that doesn't work, what remains? Sex segregation ?
You are in a bubble. A neo nazi march was banned two weeks ago in France before being allowed again by the judicial system. The exact same scenario has been repeating for pro-palestine protests.
At least in France, the scenario seems to be that the government wants to ban any controversial march and is being kept under control by the justice system.