In that suit, Nike has accused Yum of infringing its trademarks for the Air Force 1 shoe design, a pattern Nike maintains it has marketed and promoted since 1982.

FORBES: 'Yum!' TM Owner Drops Spat With Nike

Only then can Nike send you information about the latest Air Zoom shoe.

FORBES: Spam Warfare

Only then may Nike send you information about, say, the latest Air Zoom shoe.

FORBES: Spam Warfare