Black Mustard seeds have been used by many people for the purpose of Causing Confusion to their Enemies. People well-versed in such matters tell us that they walk backwards sprinkling Black Mustard seeds and Sulphur Powder on an enemy's doorstep or throw the seeds in the yard to cause trouble.
Black Mustard seeds are widely believed to disrupt the activities of unwanted associates or troublesome people. It is said that if you carry these seeds in your pocket when going into court, confusion will arise, and you will go free.
Source: The Lucky Mojo Curio Co.