Last Tuesday afternoon, at LaGuardia Airport’s Lot 7, fifty Uber drivers logged out of the app and staged a strike. Lot 7 is where drivers typically wait to pick up arriving passengers, and it was full of rows of black and gray sedans and S.U.V.s. The protesters stood at the entrance to the lot, holding hand-drawn signs that read, “Support us we have family too” and “Bring back rates to where …