But also nearly cripple a site's functionality aside from static content pages.
Even plain text pages aren't immune from the Javascript curse. I've said this before, but Google's blogger/blogspot service is one of the worst offenders. For example, here is the official Android blog from Google
http://officialandroid.blogspot.co.uk/
With Javascript disabled, nothing loads at all. When Javascript is enabled, you get a mostly text page that could easily be served without Javascript.