Hmmh. I live in Germany and I think it's down to the exact street. One or two streets away from me there isn't a lot of activity. We, on the other hand, have lots of families with kids live here, they'll put up decoration in their front yard, put on a costume and their kids will raid my street and the next one. Dunno, it somehow started and now we can't back out. And I have a hunch they brought some schoolmates from less candy-"privileged" neighbourhoods as well. That'd explain why it's so many. We're probably looking at something like 100-200 kids? I'll try to count them this time.