How does someone else using your address for auto insurance affect you and your auto insurance?

Insurance companies use a service that helps them to identify possible unlisted drivers on insurance policies. It will bring up names of people who use this address or people you have listed on your prior policies and such. All that happens is that the company may ask you about such people and you just answer the questions as to whether or not the person lives in your house and or whether or not they drive your vehicles.