Ewing was employed by Presto-X-Co., a pest exterminator. His contract of employment specified that he would not solicit or attempt to solicit customers of Presto-X for two years after the termination of his employment. After working several years, his employment was terminated. Ewing then sent a letter to customers of Presto-X stating that he no longer worked for Presto-X and that he was still certified by the state. Ewing set forth his home address and phone number, which the customers did not previously have. The letter ended with the statement, “I thank you for your business throughout the past years.” Presto-X brought an action to enjoin Ewing from sending such letters. He raised the defense that he was prohibited only from soliciting and there was nothing in the letters that constituted a seeking of customers. Decide. What ethical values are involved? [Presto-X-Co. v Ewing, 442 NW2d 85 (Iowa)]