Shockingly, businesses complain that time-sucking social networks hurt their productivity, according to a new survey conducted by Robert Half Technology. "It takes away from primary responsibility," Dave Knapp, regional vice president for Robert Half told the San Francisco Examiner. "When socializing on sites such as Facebook, we lose track of time."Besides just wasting time, companies are also worried about employees leaking sensitive information. Of course, there is always the option of blocking the sites, and according to the survey, 54 percent of businesses do just that.