1. A computer-implemented method of building a user reputation database for use in a user location data system, the method comprising: receiving, at a quarantine server, user location information comprising personally identifiable data of a user and user position data, wherein the user position data may or may not represent one or more actual geographic positions of the user; temporarily storing the user location information in a quarantine data storage database for a predetermined quarantine time; analyzing, by the quarantine server during the predetermined quarantine time, the user location information to provide a spam score associated with the user position data indicative of whether the user position data represents the actual geographic positions of the user; wherein the analyzing comprises analyzing the frequency of submission of user identification data of a particular user against predetermined benchmarks based on frequency of submissions of user location information from other users; storing in the quarantine data storage database the spam score associated with the user location information; providing data indicative of the spam score and the personally identifiable data to a user reputation database and storing a user reputation score in the user reputation database associated with the user based on the spam score; and providing data indicative of the spam score and the user position data associated with the spam score, without the personally identifiable data, to a filtered data storage system for long term storage.