evidence: Privacy and security [edit]A short URL obscures the target address and can be used to redirect to an unexpected site. Examples of this are "rickrolling", and redirecting to shock sites, or to affiliate websites. The short URL can allow blocked URLs to be accessed, bypassing site blocklists; this facilitates redirection of a user to blocked scam pages or pages containing malware or XSS attacks. TinyURL tries to disable spam-related links from redirecting.[33] ZoneAlarm, however, has warned its users: "TinyURL may be unsafe. This website has been known to distribute spyware." TinyURL countered this problem by offering an option to view a link's destination before using a shortened URL. This ability is installed on the browser via the TinyURL website and requires the use of cookies.[34] A destination preview may also be obtained by prefixing the word "preview" to the URL of the TinyURL; for example, the destination of https://tinyurl.com/8kmfp is revealed by entering https://preview.tinyurl.com/8kmfp.