Readers discussing Lewis Carroll's nyctography substitution cipher question its practicality for writing in the dark, noting that standard handwriting works just as well. The conversation shifts to nostalgic anecdotes about childhood attempts to learn fictional alphabets, such as Tolkien's runes, which are often forgotten over time. Ultimately, commenters reflect on DIY cryptography projects like cardboard cipher disks, concluding that creating these secret codes is far more enjoyable than actually using them.