Have you googled possum recipes, They would be a delicacy in a lot of parts of our world..........speedy
Speedy, if there is one thing this world doesn't need, its more people eating weird sh*t haha
Although, a possum isn't exactly a pangolin or bat - thats next level.
Maybe Norm's solution is to scream 'bloody possums, I'll kill you bast*rds' whilst he sprays them. That way the neighbours wont be wondering/concerned about his stability.
They will no longer have any doubt about it

In all seriousness, I really hope you can sort them out somehow Norm