[thaumasiotes]

> I know a few friends who have 'custom' fonts on their phones.

It can get much worse. I have a friend who uses a "cute", handwritten-looking font on her phone. She is Chinese. When she sends me screenshots, I can barely read them. I have enough trouble with standard characters.

QQ took that one step further, and let you customize the font in which your messages appeared to other people. I don't think QQ is as popular as it was, though.