Last time I checked, ASP.NET ViewState wasn't an Appendix to be cut out. The Flesk.ViewStateOptimizer makes this claim:
Reduces downloading time of your website or web application, by not sending back the page's Viewstate hidden field.
Oy! ViewState is one of the most useful and most maligned inventions of the .NET era. Get to know it. Turn it off selectively and when you know what you're doing.
I'm going to go 'optimize' some nose hair now.