This is why in the last 30 years, we have evolved Flight Manuals an order of magnitude thicker, as airframe manufacturers reacted to stupid accidents by starting to list all the things you should not attempt, and prohibiting them.
Happily, their doing so has kept the insurance premiums low for responsible pilots, as the insurers can deny claims based upon flight manual prohibitions. Thus, I can think of a flight manual for a tail dragger which would prohibit waterskiing it by it's wording - though not that of Maule, I suppose...
I was taken for my first flight in a Harvard last week, and an Oshkosh "grand champion" one at that. After ten minutes of getting used to it, I was invited to roll, then loop it. I did a few times. As I flew it back toward the airport, and lowered the wheels, I thought to myself of someone wanting to waterski such a piece of history - can they not simply be happy with their opportunity to fly it at all? Or, to fly anything at all??