Should cell phones be allowed at school?

A few weeks ago, New York City mayor Michael R. Bloomberg announced that he intends to enforce his city's ban on cell phone use in schools. The ubiquitous devices are prohibited on New York's public school grounds, as they technically have been for years, but now Bloomberg says he will send police to campus to confiscate them, and angry parents and policy makers have risen in protest.

Those in favor of allowing cell phones on school campuses say they enable families to keep in contact during school hours and can be vital in emergencies. Those who object to students carrying cell phones claim they are a nuisance and a cheating device and can even be a danger. (Some, for example, claim they can be used to organize gang activity.) Where should schools draw the line? We're interested in your opinion.