I just bought a NEW Pro... and there's a "Reminder" already in the Reminder app. How worried should I be?

I bought a new 13" MacBook Pro less than a week ago. Today, I opened the "Reminders" app and in the completed section was a reminder dated January 23rd, 2012 (today is June 14th, 2013!) and it says, "Be a *****". According to this site, http://www.chipmunk.nl/klantenservice/applemodel.html, the computer was manufactured in May 2013, so the date is probably made up. Should I be worried about whomever was messing with my computer? Worried if maybe they put a keystroke logger on it or something? Should I call Apple? I expected a new computer, not a used one. Thanks.