I havent done anything yet as I know for a fact it will kill him when I get back on my feet and make a sucess of myself, and even more so when the kids do.
The best I have read about though were:
One woman was divorcing her husband after he had an affair, she reamined talking to him for whatever reason, but he went away for a 2 week holiday and asked her to look after the house as he was very houseproud.
While he was away, she took the metal curtain poles down and put frozen prawns inside, then put the poles back up. She put fillets of chicken under the floorboards over the hot water pipes, then put the carpet back in place.
She found the spare set of car keys and injected milk into the seats, parcel shelf, floors and in the roof lining.
He got back 2 days later none the wiser. After a week or two he called her for a chat and said that he just can not find where the smell is coming from in his house. This went on for nearly 2 months. It drove him so mad he even resorted to putting holes in the walls to see if there was something festering in there but never thought to look under the floorboards. He replaced the carpets and curatins and the sofas and had the car valeted. The car improved a little as did the house, until it all slowly crept back.
He eventually moved into a flat..
and took the curtain poles with him.
The other one was a woman who's husband had cheated on her, so as revenge she took every single bottle of very expensive and some rare wine and went around the neighbourhood, leaving 3 bottles on the doorsteps next to the milk. As a Christmas present.