That is impossible today. You can bet that the major social networks and databases out there have a file on you at the time of your birth. People who have never used the internet most likely have "ghost files" in these companies because they have been talked about by family and friends. How do you protect stuff like that? Even your new smart TV is logging what you are doing and sometimes what you are saying. Just mentioning your grandma is having a birthday next weekend and you are traveling to "destination" will give them her surname, birthdate, and location. You can just start searching to find all the other relevant information on her to create a very detailed file. If you don't know that "Company A" has a ghost file on you, how do you contact them and delete it? Yes, it is that scary.