bad website design tip

While the user is typing a detailed message in your website's "Contact Us" form, pop up a message that they will be logged out in 2 minutes unless they click a button to stay logged in. When the user clicks the button, navigate them to another page, causing them to lose the entire message they had been writing.

If the user clicks their browser's Back button, show them a brief tantalizing glimpse of the prior page with their message still intact on it, but then immediately switch back to the other page again. Each time the user presses the Back button, switch back to the other page even faster, to make sure that they don't have enough time to select and copy the text of their message.