I don't have to take a position on that to theorize that Apple can use the DMCA to take it down, citing 17 U.S.C. Sec. 1201 (a). [1] [2]
Nevertheless I think you're right, it doesn't violate anyone's copyrights.
[1] http://chillingeffects.org/anticircumvention/faq.cgi#QID91
[2] http://en.wikipedia.org/wiki/Anti-circumvention#Distribution...