Interesting about the different politics of jaywalking (I think I did know about DC's jaywalking laws, though I've never understood why they were so draconian). I can't say that I did it even remotely as much in the UK, partly because there weren't as many streets governed by traffic-lights where I was, partly because the cycles were usually pretty sensitive to both traffic and passenger demand, so it wasn't hugely taxing on one's patience to wait.

And interesting about how rules and byelaws in cities in general differ, yes.