Cell Phones can be a nuisance.
Education is a enough of a struggle cell phones don't help.
Learn what Cell Phones are a gateway to.
Cell phones make it easier for students to cheat. Smart phones can open the gateway to all types of things. In foreign language you can get to google translate, there are multiple instances of plagiarism on papers, kids even look up the copy of the paper online and steal the answers.
Cell Phones can be bad for younger children.
Cell phones can create harmful enviroments throughout schools. "the panel outlines negative effects associated with children unsing cell phones, such as having access to harmful and inappropriate information that can, in some cases, lead to bullying or violence among students." would you want your own kids to become subject to hardcore bullying?
Some key representations
Cheating
http://entiregospel.com/tag/tests/
Cyber Bullying
http://www.mchenrycountyturningpoint.org/blog/?m=201210
Takes away from the lesson
http://my.hsj.org/Schools/Newspaper/tabid/100/view/frontpage/schoolid/3940/articleid/436640/newspaperid/4126/Cellphones_Are_Distractions_in_Class.aspx