The psychic says pirates are coming

where else would pirates be? they dont exist

Almost everyone on the Internet can fall under a loose definition of "pirate". The term can also be loosely applied to anyone who plunders, whether they have peglegs and eyepatches or not.

Notice also that Pirates in the classical sense still exist in narrative media. For example, look to the recent Disney films.

Someone says "Pirates are coming", they could mean in any number of fictional media or even a loose definition that can apply to any thief. The primary method of predictions is to be vague, say something that can be interpreted many different ways before, and can only be "proven" to be "true" after the fact.

It's not true . They all talk like that. Reminds me of that Avatar episode, rofl.

Recall however, that her initial prophecy was proven true thanks to Aang's involvement.