From DemocracyNow:

The U.S. State Department has imposed an order barring employees from reading the leaked WikiLeaks cables. State Department staffers have been told not to read cables because they were classified and subject to security clearances. The State Department’s WikiLeaks censorship has even been extended to university students. An email to students at Columbia University’s School of International and Public Affairs says: "The documents released during the past few months through Wikileaks are still considered classified documents. [The State Department] recommends that you DO NOT post links to these documents nor make comments on social media sites such as Facebook or through Twitter. Engaging in these activities would call into question your ability to deal with confidential information, which is part of most positions with the federal government."

Got that?

If you're a student and access this material, you could be barred from any Federal employment.

And by the way, this is not just university students. 

I am aware of (but have not until now reported on) a series of "all-staff" memos that have gone out to all employees of a number of firms that do business with the Federal government, including some classified work, warning that any access to Wikileaks including on personal computers wholly owned by the employee at their home constitutes an event that may result in them being fired and/or having their clearance revoked. 

Needless to say if you have a clearance (and need it to do your job) and it's revoked from an employment perspective you're immediately screwed employment-wise.

This is not limited to one or two firms - it is a widespread  and perhaps even government-wide threat.

Do not believe for a second that people cannot figure out that your computer is in fact your computer and that any sort of "obfuscation" of your identity will be effective.  Reliance on such claims is very foolish.

I have repeatedly caught people who have been banned on my forum and think they're "anonymous" as a consequence of surfing through a proxy or other means of obfuscation of their identity.  

It is frequently possible for me to prove to a degree of certainty that I'm sure would meet at least the standards of evidence in a civil court that the machine involved in the second access is in fact the same computer that was used in the first.

I won't tell you how I do it, but I assure you that I, as a person of reasonable levels of skill in the "dark arts" of Internet processing, am able to do so.

I am absolutely certain that the spookworks folks are similarly competent should they have reason to investigate such a circumstance, and as such these threats must be taken seriously if you are, or ever contemplate, working in a position where access to classified information may be part of your job.