This has been around for ages
dear gosh it makes the news, I don't what is the noun for really old news, history, or how about cache.
If your site is being indexed by google who runs an open cache then the information is not secure it is that simple :) Same as if you had a user who just posted all your content :)
Java Applets that's the way, wheel out spotty blamonge girl, she has to be good for something, even then they could take screen shots ;)
There is actually a way around this, but I am not saying, it is a useful feature at times, even if just see the squabbles on experts exchange about how their completely off base answer to a question was really right, so they can move up the experts ladder :)