Should a 1-byte (actually 1-nibble) destination alias be kept?

[Poikilos]

Current code:

                if (len(frame.data) > 0):
                    destAlias |= (frame.data[0] & 0x0F) << 8  # rm f bits
                    # TODO: Is this ok when len(frame.data) <= 1? Still << 8?
                if (len(frame.data) > 1):
                    destAlias |= (frame.data[1] & 0xFF)

Should we have a warning below that?

                else:
                    logger.warning("Missing last 2 nibbles of address in received data")

or discard the CanFrame?