Amazingly enough, the Unicode people are all over this. See, for example, the Emojipedia article on Unicode 8.0 code-points. See, for example, the party-popper or everybody's favorite pile-of-poo. I personally hate emoji, and every time my mobile phone keyboard dumps into emoji mode, I want to shoot somebody, but... I also have a ten-year-old daughter, and she loves the stuff as do all her friends.

We're doomed.