I wish that this wish would be denied OR that no bad effect would result from the wish.
(Logical OR, there. The wish would be granted if it was denied, and/or if no bad effect would result from the wish. The wish would be denied if it was granted and a bad effect would result from the wish.)
Granted, they can control nothing. The house falls into disrepair, they have to live off your bank account and you end up having to take care of them with your own money. And just for kicks, I'm going to make them your exact age and health, so they die when you do! SUFFER! SUFFER!!!
I wish my house wasn't so hairy.
I am the restless haunt of DBF.
I'm in ur walls, eetin' ur pilloes! So get away from mah corn! I'm in ur cornfield, WHISPERING IN UR EARS!!!
Granted, but it somehow turns out that the hair was vital to the structural integrity of the house and it collapses on you and your entire family, including yourself, dies a bloody, painful death of blunt force trauma, suffocation, and 3rd degree burns from the electrical fires.