There is no such thing as poaching. There was in the amateur era (e.g., Des Connor, Greg Davis, Topo Rodriguez, Pato Noriega) but it has gone since professionalism started. The anomolies in the regulations hanging over from amateurism have been removed in the professional era. The regulations are now as clear as could be.
Let's start with some extreme claims of poaching. Simon Shaw was born in Kenya; I have seen claims that he is a poachee. There are ridiculous claims that George Smith was poached from Tonga (his Australian father doesn't count in his parentage, apparently), George Gregan from Zambia (same as Smith re parentage) and that Timana Tahu was poached from NZ (born in Melbourne and never went to UnZid until on a rugby league trip). As you move from the extreme to the moderate, the same logic applies all the way, in gradually lessening intensity. Latest examples: claims that Rocky and O'Connor were poached from Queensland - nonsense! What claim has Queensland have to ownership of either?
In a professional sport with clear rules on eligibility, it is a waste of time (and totally illogical) to be concerned with claims that regional "unions" have a right to a player because of his birth or parentage or any other factor EXCEPT a binding contract in force. When the contract is up, it's up and the player can go where he likes. If a player is at school or in an academy and doesn't have a binding contract, he can go where he likes.