We had the semi-official leaks and then the semi-official denials and then all the Very Serious People talking about how silly little people had crazy ideas about what security measures would be put in place. And then of course.
If that's what you "need" to do (you don't) to host this kind of public event in a city (shutting down the city), then don't host this kind of public event in a city.
It doesn't bother me because it will affect my life. It bothers me because it's stupid (and likely dangerous and will contribute to problems not prevent them).