A drone getting sucked into an engine of a jet on takeoff, could be catastrophic. The Lipo battery would be the issue, not so much the drones frame, or motors, but that Lipo would burst into flames, and could cause the engine to shut down, and on a 2 engine 737, the loss of one engine on takeoff will bring it down. Considering Midway airport in Chicago is in the heart of the city, I could see this happening with some kid wanting to see a plane taking off up close and personal, without knowing anything about air turbulence from previous planes, and how it could cause the drone to go in an unintended direction.