Another thing you can do with Punycode is use it to give American Baudot TTY/TDDs the ability to transmit Unicode, because Punycode's characters ARE safe in Baudot as used by TTY/TDD. Sending Unicode over TDD would allow for quite a lot of non-English conversations to be had by the HoH. Sending stuff like emoji and pictographs or music notes would work. So you'd want to hook up UnifontEX (especially once I get it to mathematical maxout for 65,535 glyphs.)