domestication

I was wondering if i could get an experts oppinion on this.
I have an idea of putting together a program for domesticating common east coast snapping turtles. It may seem odd to those of you who think of them as huge, aggressive turtles who will snap off a persons finger on a whim, but there are people who raise them as pets with great success, and getting them to breed in captivity.
Owners claim to teach them tricks, they can recognize individuals, and show a devotion to their owner.
These are the traits that could be worked in such a program:
-size/weight...though some might prefer a big breed
-temperment...to get them loyal to people, and to ensure that no more fingers could be snapped off!
-diet...to tolerate junk food that uninformed pet owners might give them, as people today misfeed often dogs. As a rule of thumb, the imortant part of this is getting them used to corn which is more than abundant in our everyday diet.
-habitat... this is not important, but it will be more practical for people to have them in a more tortoise-like habitat/environment.
In any case is it even remotely possible to attempt this?
Alot of owners I know will go the distance to make this work.