My understanding is that javascript is a part of the web today, and everything around it makes it easier to run javascript applications in your browser, making websites more powerful. I personally love this and a lot of website I browse would be worse without javascript (google docs, calendar, etc.), so I have trouble understanding what is wrong with javascript running.
Also, since now most apps are complete javascript apps (and not only some DOM manipulation), it seems a lost cause to try to get website optionally "extend" their experience with javascript. That would mostly just imply to re-built most of the page for when javascript is disabled.