Possum Boots

We have a house guest.

I am in two minds about said guest.

On the one hand, I am a fan of all things native and lovely. He has a right to exist, we stole his habitat etc etc. He also cute, as in the original "ugly but interesting" meaning. He may well be the strangest looking possum I have ever seen - he looks like he's wearing glasses.

However

On the other hand, he's munched my pelagoniums to buggery. He's also taken to peeing dark brown possum pee all over the deck. And his most heinous crime is that he lives in the roof. Right above my head. And he wears great big (invisible) possum boots that make it impossible to ignore his comings and goings. And he's a dirty stop out who doesn't come home until 5:30am, and then does so in a manner highly reminiscent of my little brother in his 'I'm such a rebel' period. The Brother would very very quietly barge into the house, taking about 10 minutes to unlock the door. He would very very quietly creep into the kitchen, banging every single piece of furniture on the way. He would then very very quietly decide to make himself a snack, involving much opening and closing of cupboards, fridge, freezer etc. He would usually put said snack in the microwave, and while waiting the interminable age it took for snack to defrost (usually about 2 minutes) he would go and lie very very quietly down in the lounge room. Where mum would find him a few hours later. The possum is obviously in his 'difficult teenager' phase.

What to do? Do I hope he grows out of it and becomes a functioning member of society? Or do I resort to means more drastic? Could I forgive myself if I gave Mr Possum his marching orders, and threw him out into the cold cruel world?