Well to keep him happy, perhaps he should take a trip to Gloucestershire where they have PAPIs set for 5.25 degrees for the little people as well as 3.5 degrees for big people...
My instructor thought I was looking at the PAPI when doing some circuits - ATC were very obliging in immediately turning them off for him
Also worth noting that PAPIs are normally setup to be in line for for large aircraft to reach the touchdown point, with their pilots high above the ground - not SEP training aircraft...