Maybe then GitHub should add a text-based expression for people like you.

Like Google does in Gmail, where you can turn off the icons for the "archive", "report spam" actions so that the text is shown instead.

I'm sure this would add a lot of value to GitHub /s

Or you ask your OS vendor (or each website operator) to also ship an optional set of emoticons with less childish images. Start a petition and I'll sign it.