Apple has won a patent that allows parents to set parental controls for content of texts. For more information:
http://www.appleinsider.com/articles/10/10/13/apples_anti_sexting_patent_generating_big_buzz.html
http://tech.blorge.com/Structure:%20/2010/10/13/apple-wins-patent-to-censor-iphone-texts/
http://www.salon.com/life/teenagers/?story=/mwt/broadsheet/2010/10/14/sexting_censors
http://blog.christianitytoday.com/women/2010/11/apple_takes_bite_out_of_sextin.html