"As more US companies reported their business was impacted by the exposure of sensitive or embarrassing information (34 percent, up from 23 percent in 2008), an increasing number say they employ staff to read or otherwise analyze the contents of outbound email (38 percent, up from 29 percent in 2008). The pain of data leakage has become so acute in 2009 that more US companies report they employ staff whose primary or exclusive job is to monitor the content of outbound email (33 percent, up from 15 percent in 2008).
"In addition, companies are regularly ordered to produce employee email as part of legal actions, exposing its contents to outside scrutiny. Nearly a quarter (24 percent) of large US companies report that employee email was subpoenaed in the past 12 months."
"Thereâ€™s likely two factors at work here: employers more closely monitoring social media sites, and employees continuing to not use common sense when posting about work life, either by sharing sensitive corporate details, or simply by making foolish remarks about their employer. … Even if you do use common sense in your postings, however, itâ€™s important to remember that when youâ€™re behind the corporate firewall, thereâ€™s a good chance that anything you write in email, IM, or social media is being monitored. Thus, itâ€™s best to keep the commentary offline, at least unless youâ€™re absolutely sure both your privacy settings and IT setup make sure that whatever youâ€™re saying will only be read by its intended audience."
Seminal post explaining how link shorteners might be breaking the web.