LA will eventually do Paris one better.
LEO no-go zones on the freeways.
There are two groups out there who do this sort of thing. First would be the tuner “Fast & Furious” types, mostly younger male, all sorts, white, asian, black, hispanic. A criminal element is present but it doesn’t predominate. Blocking the freeway for racing is viewed by them as more akin to civil disobedience or a prank. Then there are the crotch-rocket bikers who will race not just after blocking traffic but also mixed in with regular traffic, wheelies, super-high speed, very dangerous. Almost entirely black. Hostile. Wouldn’t be surprised for a political element entering into blocking the freeway, since they honestly don’t care about the safety of surrounding traffic.