Include

I think the cons mentioned are more what if possibility.
What if they are sterile (mules)
What if they escape or get released
What if they over run native wild life
What if they get a better market than natives
What if CC decides to cross a water with a taipan and sell them to newbies as pure bred waters.LOL
I too am amazed at no personal attacks yet so I am hereby going to call my own mumma a hoe....