You are exposing yourself to a possibility of loss or break.
For example, if you want to sell badminton rackets and shuttlecocks, you could possibly eventually also sell tennis rackets, tennis balls, table tennis rackets and balls, nets, etc. http://carstarmechanicsburg.com/__media__/js/netsoltrademark.php?d=Zip.2Chan.net%2Fbin%2Fjump.php%3Fhttps%3A%2F%2FCalgaryisbeautiful.com%2Four-town-solar-flower-power-more-than-a-cute-art-installation-3%2F