Social networks like LinkedIn and Yelp have great potential in business, but like so many other useful tools on the Net, they could be marginalized by the unscrupulous. The BBC reports that phishers can “attack could mine social networks, such as Orkut, to find out who knows whom and use the names it finds to create fake e-mails that look like they come from a victim’s friends or relatives.” The report quotes researcher Markus Jacobsson, who says, “A phisher can find out whether a person in your ‘personal network’ list is a wife, a husband, a sister or a business associate, and take advantage of that.” Jakobsson notes several other new ways identity thieves can exploit the Net.