1) Most GitHub users are more tech-savvy (and often more CSS-savvy) than your average MySpace users, and 2) Most GitHub users put a lot of value in their repo pages,
this actually seems like it wouldn't _inherently_ be the worst idea, assuming the proper precautions were in place versus bad actors. Allowing each org to fully customize their git repo almost encroaches upon (or replaces?) project websites, which already has some overlap with README files (which aren't currently prioritized). Kill two birds with one stone by giving developers what to prioritize on their repos?