>What if the the space is full of efficient OAM encoded radio transmissions Unlikely. OAM is very localized: only those along the transmission path can deter

>What if the the space is full of efficient OAM encoded radio transmissions Unlikely. OAM is very localized: only those along the transmission path can determine the OAM component of the light. You can't "broadcast" an OAM signal across a large area.