
Airplane crews still tell passengers that cell phones will disrupt navigation and hospitals post signs that phoning home will wreak havoc with X-Rays. Both are lies. In most hospitals today, signs are posted banning cell phones because they could interfere with hospital equipment. Many years ago, that was actually true. But improvements in cell phones in the last decade have made the interference non-existent today, unless someone is using a very old first-generation cell phone. So why are these bans still plentiful today?