Very honestly - I AM aware that Possums are protected... HOWEVER- Where I live the National Parks rangers aren't interested in relocating or trapping them. After 6 months, I used to take the broom and bash the ceiling each time they started fighting.
I don't care if it is a Cat, Dingo, Possum, Horse, Cow, whatever, it should have been destroyed humanely (quickly, not tortured). Where I was living at the time there was SIXTEEN possums that I counted in the ceiling!!!!
Oh- and the Ranger told me to shoot them... So that will give you an idea of the numbers that are around here. I am not excusing the feelings I have for them, but I know someone else that had one in her wall & she tried to poison it, as it kept her children awake... Someone else up here didn't train their dog, but it hated possums and cats- if it smelt one it would hunt them out.