Google never forgets. Google backs up, or “caches,” the entire Internet frequently. Once something is online, it is practically impossible to erase all records of it. People may have some control over access to their digital information; for example, who can see their photographs on Facebook. However, they cannot control what other people do with this information. A person can limit access to her photographs to only a few people. But it takes only one person to e-mail it to someone else or post it on Picasa—once the cat is out of the bag, there is no putting it back.
