you mention possible exceptions, well that is where the grey area begins isn't it? as has been mentioned who decides where the "possible" comes into it?
everything we do in life has a bearing on wildlife, that is why we have lost so many species to extinction, yesterday i saved a frog from being eaten by a tree snake and i felt fine about it! and yes, i probably would try and save the lorikeet if i thought it would survive, if the quoll had already killed it then fair enough though.
love the comment on getting the animals to change their practices because it inconveniences us - great argument there! between the name calling and your already issued infractions i can see you have been in some good debates already!