Nearly sixty years ago, whilst gliding at RAF Swanton Morley (UK), a Handley-Page Victor dumped fuel all over the gliding circuit traffic on approach to (probably) Coningsby. Six gliders in the air, two crew per hull, open cockpit. Dozen more cadets and RAF personnel on the ground.
Our uniforms reeked of kerosene and our eyes stung a bit, but the CO of the RAF gliding school went apesh*t because, apparently, Jet A1 is an excellent solvent for the glue holding the fabric of our gliders (Slingsby T31, IIRC) together.
Pretty sure the Officer Commanding RAF Coningsby would have heard him from circuit height, across the Wash.
Anyway, I have never had any health issues as a result of that one-off dousing, and don't know of anyone who was there that day that did. So probably not the end of the world for the kiddies that caught a whiff of the good stuff that reached the ground. It's not like it's an everyday occurrence.