I'm a bit puzzled by the concept: visual symbols can be hard to parse across cultures, and they surely expected what's happened with people both misinterpreting things and deliberately adapting their meaning, for example to talk about sex. But my main issue is that they're so damned small. Unless I am already very familiar with the symbol, I can't see what it is, and I understand a lot of people have that problem. Why aren't they coded so they can be embiggened, like fonts? As it is, more than half the time they're just unreadable clutter.