Seeds of revenge

A recent report on Snopes tells of wronged partners taking their revenge by turning the inside of their ex-lover's house into a lawn by spreading seeds over carpet, watering them in and waiting. I had thought there would be something more to it - like some vindictive message spelled out in the grass - but apparently not, which is a shame because that could be quite a nice touch (as long as the wronged party had truly been "wronged").