Personallly, I feel any examiner should be fired for failing to comply with the loadsheet, and from memory, the C152, the maximun load is 2 x 12 1/2 stone, so beyond that you need to go less than full tanks!
I seem to remember the examiner I was refering to was a FOI for a UK airline, until a fatal accident in the M1 in the late eighties, and became a CAAFU examiner (gardening leave) later returned to being a FOI and CRM examiner????