This looks like the work of a schizophrenic. It sounds demeaning but I've seen similarly "encoded" messages, often around some common item (like a cigarette pac

This looks like the work of a schizophrenic. It sounds demeaning but I've seen similarly "encoded" messages, often around some common item (like a cigarette pack). They write them during psychosis and later find them and obsess over their decryption.