At a distance works great, my friend (not deaf, but works in a school) taught her kids BSL (also not deaf) and recounted the story of how she was able to bolloc

At a distance works great, my friend (not deaf, but works in a school) taught her kids BSL (also not deaf) and recounted the story of how she was able to bollock the kids once in public across a hall. She also had no trouble ordering a drink from her boyfriend (not deaf) who was standing at the bar some way away in a crowded pub. Sign languages are indeed quite useful. The article seemed a bit straw man and whining, as well as recycling old ideas, such as letting groups isolate themselves from others, but I confess I was too bored to finish reading.