Just the world? Well, all you need is a good rocket ship so you aren't on it anymore, and take a look.

If you mean destroy the MW branch in which it's said, then Nick Tarleton's answer works - that rule would make the choice to say 'Abracadabra' far smaller in probability than saying similar things that don't destroy the world. People saying that one thing would be greatly suppressed relative to, say, "Alakazam" or "Poof" or "Presto Change-o", and it would quickly leave the lexicon.