November 17th, 2003, 04:55 pm To arms! MBTA officials have deemed nonacoustic music a hazard in T stations. Beginning Dec. 1, they are banning electric keyboards and guitars, microphones, and amplifiers, saying they drown out important messages on the public address system. Saxophones, trumpets, and horns of any kind also will be forbidden.I can't even begin to say how disappointed and angry I am about this. Current Music Mary Lou Lord, "Camden Town Rain"