Emoji is a bit of fun, and the argument that it has poisoned young people's ability to learn true English is weak, because English is not going away any time soon.
That was the conclusion I came too as well - things like Emoji Dick are interesting and a bit of an entertaining novelty, but the exception rather than the rule.
Still, it's quite interesting to think about how they'll be perceived by users of whatever the Internet looks like in another hundreds years' time.
Emoji is a bit of fun, and the argument that it has poisoned young people's ability to learn true English is weak, because English is not going away any time soon.