You have a lot more faith in people in large crowds than I do. Unfortunately I have spent far to many years in sales and security to share your optimistic outlook. Then there is the problem of too few locations. Sure, they can add more, kind of like they did with the Cake phone challenge, but then the cities we have right now (and the politicians associated) mean nothing so there is no point in speculating. Then there also is the issue of repetition, have they ever done the same thing twice? No, not really. This won't be a run to the location, it will be something more.
Both scavenger hunts started with a count down and one had a list of cities.
If you think there is no point in speculating then depress the power button on your monitor.