Larry Dighera schrieb:

It would seem a placard would be more prudent.

If this simple instruction is already too complicated for a pilot...

It's more a matter of the possibility of someone failing to inform the
pilot of this hidden hazard. A placard is more foolproof than relying
on the spoken word or a phrase buried in the POH.

Ok. So let's forget the POHs and replace them with a bunch of placards.
Reminds me of my monitor full of post-it stickers.

Stefan