The National Association of Theater Owners, believing that the obnoxious (my word) intrusion of telephone conversations during movie showings has shooed folks away, is asking the federal government to permit the installation of devices that block mobile-phone signals. Alas, a spokesperson for the Cellular Telecommunications and Internet Association tells the Los Angeles Times that his group is opposed to the measure "because it interferes with people's ability to use a wireless device in an emergency situation"  such as letting your buddy Cheri know that her man T-Bone is stepping out on her at King Kong with that hussy, Phyllis.