Was there any knife crime at the cookout? Was there any more crime than you'd expect with a big bunch of people anywhere in London? Not that I know. So your comments are without cause. You link the threat of knife crime to this *specific* event you don't want to exists cos it stops you parking for a day - you do this in order to suggest it *specifically* is a problem. That's dodgy and rather cheap. The same amount of people in Peckham would offer the same amount of risk and you'd be happy to have the 'threat' of knife crime there.
Smiler, again, get things in proportion: it's one day a year, and road rage comes at you from all angles in London.
I'm constantly amazed by the delicate souls we have on this forum. A parping horn and a few chicken scraps are enough to send you into apoplexy.