What a horrible thing to do. If you know someone with epilepsy it would be worth spending the time to take them through how to disable gif and flash animations

What a horrible thing to do. If you know someone with epilepsy it would be worth spending the time to take them through how to disable gif and flash animations in their browser. I had a quick look at found there are a few extensions related to this -- does anyone have any experience with them and/or recommendations? It seems like the type of thing for which there should be an "enable on demand" plugin that requires the user to specifically ask the browser to animate anything on the screen.