Iirc this was also an issue for hacks on the computer as well. Something about naming it pdf but it was actually an exe because they used right to left. Something like that

I think kaomoji have been a thing in Japan even before unicode was invented. The Japanese encodings and IME (input method esitors) allowed them to type a wide variety of characters, punctuation and symbols that aren’t available in most western encodings, so I feel like the Japanese folks had a head start on creative use of typography.

For example, if you want an eyeball you can just type “do” (degrees), and the IME will pull up °, and “omega” gives you ω, so it’s pretty easy to make (°ω°).