There is nothing glorious about clicking a button only to have nothing at all happen because a fragile dependency system is broken, making the entire site less usable.

I use Ghostery to block a lot of tracking JS. This includes things like FB stuff. The number of sites that break because a call to "FB.init" throws an exception is astonishing.

It's ridiculous how quickly people (by which I mean developers) have forgotten the concepts of graceful degradation and progressive enhancement.

There are very few use cases where a web application simply cannot function without javascript.