Those concerned about Internet privacy often cite a number of privacy risks — events that can compromise privacy — which may be encountered through online activities. These range from the gathering of statistics on users to more malicious acts such as the spreading of spyware and the exploitation of various forms of bugs (software faults). Several social networking websites try to protect the personal information of their subscribers, as well as provide a warning through a privacy and terms agreement. For example, privacy settings on Facebook are available to all registered users: they can block certain individuals from seeing their profile, they can choose their "friends", and they can limit who has access to their pictures and videos. Privacy settings are also available on other social networking websites such as Google Plus and Twitter. The user can apply such settings when providing personal information on the Internet. The Electronic Frontier Foundation has created a set of guides so that users may more easily use these privacy settings and Zebra Crossing: an easy-to-use digital safety checklist is a volunteer-maintained online resource. In late 2007, Facebook launched the Beacon program in which user rental records were released to the public for friends to see. Many people were enraged by this breach of privacy, and the Lane v. Facebook, Inc. case ensued. Children and adolescents often use the Internet (including social media) in ways that risk their privacy: a cause for growing concern among parents. Young people also may not realize that all their information and browsing can and may be tracked while visiting a particular site and that it is up to them to protect their own privacy. They must be informed about all these risks. For example, on Twitter, threats include shortened links that may lead to potentially harmful websites or content. Email threats include email scams and attachments that persuade users to install malware and disclose personal information. On Torrent sites, threats include malware hiding in video, music, and software downloads. When using a smartphone, threats include geolocation, meaning that one's phone can detect where one's location and post it online for all to see. Users can protect themselves by updating virus protection, using security settings, downloading patches, installing a firewall, screening email, shutting down spyware, controlling cookies, using encryption, fending off browser hijackers, and blocking pop-ups. However, most people have little idea how to go about doing these things.