Cooper Barton, 5, a kindergartner in Oklahoma City, was forced last week to turn his T-shirt inside out to avoid violating a citywide rule on school clothing, The Detroit Free Press reported. The violation? Barton was wearing a University of Michigan shirt with "The Big House" written on it. The Oklahoma City rule, designed to prevent students from wearing gang clothing, banned not only gang slogans on clothing, but also non-Oklahoma college attire.