Blue Shirts

From gizmodo:

Whether your gadget-buying experiences at Best Buy have been pleasure or pain (ours have tended towards the latter), you're probably familiar with the uniform their employees wear: royal blue shirt, khaki pants, black shoes. New York-based prankster group Improv Everywhere decided that for their latest mission, they'd get about fifty of their operatives to dress like Best Buy sales staff and invade the Chelsea branch. Customers were confused, some sales staff were supportive while others got upset, and predictably both management and security went apoplectic.

improveverywhere.com