Right after the earthquake last year in LA, everybody started using their phones and all major carriers were strained so people couldn't get through. So yeah it would work.
But if you actually got enough people to do this for an hour, I guarantee you'll have at least one customer with a life or death emergency that wouldn't be able to get help during that hour, making Dan Lyons look like a big *******.
That person will sue Dan Lyons for damage that he is duly responsible for.