For the many web developers out there who have been swept along by the scripting boom of the last couple of years, here is one more argument for making sure to design your scripts for graceful degradation.
Just take a look at the security settings in Internet Explorer. Turn it up to “High”, and boom - no more scripting. I don’t know how many people do that, but I do know that many are worried about security when they’re surfing the Web. Increasing security probably looks like a tempting option to them.
Keep graceful degradation in mind and you will be fine more often than not.