Pour water on the bed, then cover the spill with a dry duvet so they can't tell until bedtime.
Find their stash of spare batteries (AA/AAA) and take them with me when I leave.
Ditto with any pens in the house
Break every drinking utensil (cups, mugs, glasses)
If it's summer, turn the heater on. If it's winter leave all the windows open.
Smear peanut butter on all the door handles
Pour out their clear alcohols and replace them with water. Replace the brown spirits with tea.
Find their stash of spare batteries (AA/AAA) and take them with me when I leave.
Ditto with any pens in the house
Break every drinking utensil (cups, mugs, glasses)
If it's summer, turn the heater on. If it's winter leave all the windows open.
Smear peanut butter on all the door handles
Pour out their clear alcohols and replace them with water. Replace the brown spirits with tea.