In the military we used to dump fuel during practice emergencies to the runway. This fuel was above 5000' and offshore as per crash cards. However, during your next circuit you'd notice several fishing boats steer for the fallout area (even though the fuel had vapourised by then), and claim compensation for damage to their haul/nets. Time and time again. The MOD must be feeding a lot of civvy mouths....
It's not done now...the mil don't have the cash to train their crews in emergency procedures
