Having worked at a law firm and in the legal department of a large Wall Street bank, I don't think this is as huge of a freedom issue than you'd think. I don't expect this to get used outside that environment.
It will be yet another feature that no one uses. As long as there is a big button with the word copy on it the machine will often be unpacked, plugged in and never touched again.
I agree - I'd think the most common words on the list would be "Confidential", "Private" or a phrase like "Do not copy"
"Well, Bob, the programmers are ticked because they can't print their training handout on public and private variables..."