Whatever information they already have, I don't mind them to use to target advertising. I just don't want them to share it with anybody and I'd like them to hav

Whatever information they already have, I don't mind them to use to target advertising. I just don't want them to share it with anybody and I'd like them to have as little information as possible. Does anybody care about ads actually? It obviously is desirable to see none yet if I am shown some I don't care if it's targeted. I would only care about somebody tracking me and leaking data about me to other parties.