Cell Phones Create Safety Risks, Could Help Terrorists
AFA-CWA is urging members of the Senate to ensure that a ban on in-flight cellular telephone usage is included in any Federal Aviation Administration (FAA) Reauthorization legislation that passes out of the Senate. The U.S. House of Representatives has already included such a ban in H.R.915, the House FAA Reauthorization Bill. Cell phone usage in the cabin would create a new security risk by compromising your ability to maintain order in the cabin and to safely execute an emergency evacuation if necessary.
Patricia Friend, AFA-CWA International President, said "The use of cell phones in the cabin, by persons other than crew members and authorized law enforcement officers, poses unacceptable risks to the security and safety of America's civil aviation system."
Since all cockpit doors during flight are now locked, flight attendants are solely responsible for the safety of the passengers. Allowing cell phone use in flight would only make it easier for terrorists to communicate with each other to coordinate a successful attack. Cell phone usage could also lead to disruptive behavior by provoking air rage incidents or interfering with emergency procedures such as evacuation.
Over the past two years, AFA-CWA has been educating and mobilizing its members on this issue and, as a result, thousands of flight attendants have submitted comments to the FCC docket with the resounding message that onboard cell phone usage must remain banned.
"Keeping cell phones out of the cabin is an issue that not just concerns flight attendants. Repeatedly, studies have shown that a large majority of the American public agrees that cell phones have no place inside the cabin " said Friend.
The current generation of electronic devices with wireless transmitters (e.g., cell phones and handheld and laptop computers) produces radio signals that may compromise flight safety by interfering with an aircraft's communications and navigation systems. Furthermore, widespread use of these devices in the confined space of an aircraft cabin has the potential to compromise operational safety by increasing misunderstanding and conflicts between passengers and crew.

My best guess is, that if a terrorist wanted to co-ordinate an attack using his mobile phones, he would find ways and means to do it and defy the law.
Most terrorists are also known to bring weapons, bombs and other items that are explicitely forbidden aboard aircrafts ... so this argument sounds pretty lame to me.
If I recall, a plane crashed in a Pennyslvania field instead of the capital building or white house because of cell phone useage. Besides, if terrorists don't care that bombs are banned, what makes you think that they'll give a crap that some five foot two, one hundred pound stewardess says.
I don't follow anyone, because those that appear to be on the same path usually end up just getting in my way.