That's the snow-removal suggestion of reader Scott W. Langill, who cites the methods used to deal with John F. Kennedy's 1961 presidential inauguration:

For the barely current issue of City Paper, I wrote about the Georgetown Hoyas' new t-shirt shooter, called the T-Shirt Gatling Gun.
Who cares that the team is slumping? The few seconds it takes for the multi-chambered air rifle to fire a couple dozen shirts into the stratosphere are worth a trip to the Verizon Center.
Before [...]