sure you are right with ball pythons and in the case that someone ever would have the stupid idea to breed cats and dogs specially for this purpose!
but that was never an intention by me.
may some persons on cl have some other strange interest for doing this but i also think there will be some people that only will need cheap food for her rock or brumese for sure.
and i 'm also think the people that add those warnings on cl never had any contact with those snake owners, cause who the hell would be that stupid to tell them he want their pets as feeders?
they just have read about some internet postings were people claim to do this or something like this.
but be sure there are people out there that have done it, i saw the pics about!