Anyone with some form of valid and unique identification is an automatic target for identity theft. Elderly citizens are often a target for identity theft because thieves perceive older citizens as more vulnerable and willing to share private information.
If you are concerned about your grandparents or another elderly friend becoming the victim of identity theft, the Better Business Bureau suggests you talk to this person about the dangers of identity theft (https://www.bbb.org/local-bbb/bbb-in-nebraska-south-dakota-kansas-plains-and-sw-iowa).
It's important to remember that victims of identity theft are not just older citizens because identity theft can happen to anyone at anytime.