Parade of the stupids

The homecoming parade for one of the local high school just went by our office window, at which point everyone in the entire office seemed to think it was necessary to stand up and watch from the window. To be one of the cheerleaders riding around in the bed of a pickup truck yelling, "T-T-T-R-A! A-A-A-C-Y! T-R-A! A-C-Y! TRACY TRACY TRACY HIGH!" you have to have an IQ below 50. How low is the IQ of the people watching from a second story window?