As long as they don't disable scripts or sandbox it, and as long as they are using office computers to view it and don't just fetch the source code directly, and as long as their IP addresses are on the list....
....then the page they were trying to view will self-destruct, leaving no ttrace, not even in history.
Guess they will have to reload the source, no? The back button surely is not the way to go. Pretty neat. Here is a demo of what it would look like from their perspective. Intended more as a gesture -- a form of communication, if you will. Effective communication. You can help me by adding IP addresses to the list.
update: 'they' did something to it; the shortened links were disabled (shouldn't have used them, huh). Get the updated, working code here.
Its a work in progress. As soon as I figure out gists at github, I'll put it up. Many friends, acquaintances, and strangers helped me to hack this together. The ultra minified highly base-64-encoded source is here; if anyone wants the actual source files, drop me a comment.
Be seeing you.