> A modern analogy would be if AT&T was somehow able to ban putting protective cases on smartphones A couple decades ago, one of the telephone companies in Can

> A modern analogy would be if AT&T was somehow able to ban putting protective cases on smartphones A couple decades ago, one of the telephone companies in Canada sued a business that was giving away free protective vinyl covers for printed telephone directories. The vinyl covers were plastered with ads[1], so the telephone company argued that it was theft from their business or an infringement. I don't recall how the case turned out. [1] Example: http://www.westsky.com/phbkcvr1.jpg http://www.westsky.com/phbkcvr1.jpg