It's not scary. I received one of these letters for the DOJ vs Microsoft trial while working at Netscape and it was less scary opening it than the email from my cube mate titled "you won't believe it."

The lawyers told us ahead of time we'd be getting the letters. They told us what we needed to preserve and what we could comfortably trash. There was never any follow-up or specific requests for what I had on my machines. That was that.

The idea that getting a legal request is scary is silly. We were employees getting employee guidance from our employer on what to do at every step of the way. We weren't individuals fending for ourselves, wondering about getting something wrong, being taken in for questioning. We were doing what we always do, work hard and listen to the company lawyers if they have something to say.