With so many hacks out there recently, your first instinct might be to look at your credit cards and bank accounts after a breach. If you've racked up lots of frequent flyer points, you should check those accounts also.
Photo by Julia P
The average person might not think to check a frequent flier account -- and that's why they're a great target for hackers. You might not find out the account was hacked until someone goes on a joy ride at your expense.
You can also protect your account by protecting your boarding pass. Don't put that in the seat pocket when you're done. Treat it like a credit card receipt and dispose of it securely.
If you have a lot of points, check your account quarterly for suspicious activity.
4 Lessons from a Hack: My Airline Miles Were Stolen [Yahoo Tech via Reddit]