Yeah, then when someone who pissed you off is up for dish duty, you can get 'em back...
Our lab is pretty small (7 people). We all clean up after ourselves. The one person who tends to leave her stuff to 'soak' for extended periods usually ends up with the dirty item(s) on her desk. Unwashed. That usually keeps her in line.
She is also the only one who leaves leftovers in the fridge long to mutate into unrecognizable.