It is getting easier to stumble across offensive material while searching for information online. And there is not much we can do to prevent it, aside from installing filtering tools or blocking the internet. Sometimes when exposure occurs, finding this material can negatively impact the user of the computer and if this happens, it can leave behind evidence of the activity that a person with the right skills could find. Software products are now available that can check for suspicious unwanted porno lying dormant on the permanent storage media. For example, Snitch by Hyperdyne Software will help you delete porn and purge undesirable material that you want gone.