In my logbook all times are entered UTC - which meant for some quizzical looks from some when looking at night flying in California at 11:00 with 4 hours in the flight conditions "Night" column.
I often log flights as P1 with no take-off or landing recorded - as if I am not the handling pilot I was not the manipulator of the controls. It would only raise itself as problematic when you're scratching minutes to revalidate by experience. Perhaps one should consider revalidation by test? Cheaper and easier.
Just my €0.02
DD