The difference is that I need to trust over two billion people [1] not to disable my fire alarm. It's rather fallacious to compare this number with the number o

The difference is that I need to trust over two billion people [1] not to disable my fire alarm. It's rather fallacious to compare this number with the number of bus drivers I interact with. [1] http://phys.org/news/2011-01-internet-users-worldwide-billion.html http://phys.org/news/2011-01-internet-users-worldwide-billio...