Sure there are things you can do to game the system. You can drive it in a car (at some sort of a fast but almost-believable speed.) You can ride the segment in a pack, and sprint off the front to finish. You can wait for a tailwind day. You can use an app to make you look faster than you are; I don't know what it's called - KOMinator or something. Anybody who creates a downhill segment deserves to have it dominated by a local lowracer rider.