Henry Moore used to live over his studio. Whenever the noise of his chisel stopped, his wife would call down and ask why he had stopped working.
See eg. http://www.investopedia.com/terms/d/dinks.asp "A household in which there are two incomes and no children (either both partners are working or one has two incomes). DINKS are often the target of marketing efforts for luxury items such as expensive cars and vacations."
Edit: Prior probabilities yada yada.
Don't know if its legal but it would certainly be an asshole move.