Drill a hole into Fuel Filler Neck?

all this explosion talk reminds me of the jackass several years ago at a paint shop in Springfield Mass who used a lighter to check to see how full the barrel of paint thinner (or prep-sol) was... --- yea.
Reminds me of the guy locally several years ago who got the bright idea to try to turn a used propane tank into a BBQ grille.... without first checking to make sure it had been fully emptied..... they never did find all of him