Thank goodness jaywalking legislation doesn't exist. In this nation we have mature responsible adults who don't need herding to specific crossing places because they are too thick to be trusted to cross a road safely.
As for the coppers, I suspect they want a peaceful life so let folk in groups get away with things. It'd save on the reporting, filling out paperwork, and having to drag tens of miscreants off to the station. After all, why do what is right for law abiding society when those misbehaving are part of that same society ? It may be easier to just deal with complainers instead. Perhaps protect the wrongdoers. Consider making them cups of tea, with a few biscuits ? That's much easier.