Cheers Sdaji - although you feel the release of captive animals into the wild isn't such a big deal, it really is as far as turtles go. In a semi-controlled captive situation for example if someone had a pond of Krefft's and a pond of Murray's separated but somehow 1 Murray got into the krefft pond, it can mate with all the females and those females will have hybrid offspring for the next 4 year's as a result. I know of blokes that had it happen with their murrays and signata... they did the right thing and froze all the eggs laid for the 4 following years. Now in the wild... when that happens... it just snowballs out of control thy hybrid Emydura grow up and reproduce and keep further diluting the genetics of the endemic population. It's another problem altogether when they start mating out of their species like with georgesi and purvisi (which is happening) those offspring are sterile hybrids. Anyway, it is what it is. Maybe you're right maybe only you and I care.