here are the other two:
Myth: Your plastic hotel key card can be used to steal your identity and credit card account information.
False: Simply put, hotels do not put your personal information on the card. At the most, they will encode the room number and activation date
Myth: Back up your files because X-ray machines at security checkpoints can erase the hard drive on your laptop.
False: X-rays are a form of electromagnetic energy, but they're not magnetically charged. Electromagnetic energy is basically like light, and can expose your camera film just as light can, so watch out for that if you're one of the few photographers still using film. But sending your laptop through the X-ray machine won't damage it. There is something to be careful of, however. In the unlikely event that the security people let you take your laptop through a metal detector or examine it with a metal wand, you're at risk. These detectors send out a strong magnetic pulse that can erase hard drives.