This is how to remove all turtles from a map.
How to Remove All Turtles, etc.
This was posted on this forum for developers and server admins, but no activity so far.
As just a player, it was tested in my own environment, but I’ve had 20 years of software developer experience, and the subtext here is that if they cared, they now know how to accomplish the feat.
Alternatively, they could turn Turtles into Cats, though that is a bit more complicated.