Apple uses copyright to silence both fans and critics

A professor from a professional writing program in the US sent me a link to this cease and desist letter which appears to be sent by Apple. This type of activity is relevant for those teaching digital composing as I know those of us teaching technical writing often have students compose tutorials on using various applications. The fact that the copyright holder may disagree with the use of screen captures or images of its product should be integrated into the PW curriculum.

http://www.chillingeffects.org/copyright/notice.cgi?NoticeID=6222