@Ace(View Post) You make sure that the word wish does not and has never existed. But because the word wish never existed you never made it not exist meaning that you can not have made done it at all meaning it is back to normal and than never exists again. This means that you have created a time paradox which cancels out reality turning you into Rebecca Black.
I wish I had a pet squirrel @Petrol(View Post) does not count as you did not make a wish for yourself.