Had someone report a bug that we did not provide an error page for someone using IE8 trying to use our site. My suggestion was to create a page that simply said:
"Hi we noticed you are using IE8, you should immediately turn off your computer because it's obvious that you are too out of touch with reality to be using the internet. Please come back when you pull your head out of your arse."

The product owner did not find my suggestion as funny as I did.