There is in fact a reason those ASCII 'characters' should stay unprintable: the 0x00-0x1f (except Tab, CR, LF) range is explicitly excluded as invalid in a whol

There is in fact a reason those ASCII 'characters' should stay unprintable: the 0x00-0x1f (except Tab, CR, LF) range is explicitly excluded as invalid in a whole bunch of standards, e.g. XML.