Roger wrote:
Fueling a rented 172 and putting 40 gallons into the two 21-gallon tanks.

Why would that scare you, unless it was *after* you flew the plane.
Me? I'm paranoid about fuel.

that would scare me too; I hate the idea of sharing an
aircraft with somehow who would be so careless; what other
stupid thing the same bozo did to the aircraft?

--Sylvain