Having done this for my L1 visa, and jettisoned the USB key I forgot was on my key ring, I'm still puzzled by the author.<p>All the documentation is very upfront about this procedure. I think it should be obvious to anyone vaguely technical the range of small bugs that can be made now.<p>As such removing disambiguation is pretty sensible plan. Rather than airport security which makes a pretense of banning "dangerous" items at least in this case they can say you were warned and there is no room for misinterpretation.