NY TIMES -- Feb 11 -- Facebook offers users the option to deactivate their accounts, but its servers keep copies of the information in those accounts indefinitely. According to Amy Sezak, a spokeswoman for Facebook, "Deactivated accounts mean that a user can reactivate at any time and their information will be available again just as they left it."  Facebook's terms of use state that "you may remove your user content from the site at any time," but also that "you acknowledge that the company may retain archived copies of your user content." Other social networking sites like MySpace and Friendster, as well as eHarmony.com, may require users to confirm their wishes several times ? but in the end they offer a delete option. Facebook's quiet archiving of information from deactivated accounts has increased concerns about the network's potential abuse of private data, especially in the wake of its fumbled Beacon advertising feature. MORE NEWS @ ONLINE PERSONALS WATCH