Disclaimer: I Do Not Own Harry Potter.
Harry sat watching the Dursleys stuff their faces with the food he had cooked while they sat in the living room watching television. He wasn't allowed any, but after wiping snot on the majority of it, he didn't want any.
It was a petty and gross thing to do, but these were petty and gross people.
"Boy!" Grunted Vernon Dursley with a mouth full of food. "This evening my family and I shall be attending a party. You will be here not touching anything, not eating my food or watching my television."
Dudley smirked at Harry and the urge to tell his cousin he was munching on snotty bacon was tempting.
Silently Harry sat there fuming and plotting what he could do to make the Dursleys pay without getting into trouble.
Line Break
Harry was alone and ready to put into action his plan of revenge that come to moments before the Dursleys left.
First, he turned on every tap in the house then he ransacked the fridge and cupboards, and took the foods he liked. He put them in a bag with the few clothes he had that Dudley outgrew years ago.
He broke the television, cut up all his Aunt Petunia's clothes before peeing on all Dudley's toys then walked out the front door never to return.