It's very tempting to read HN and TechCrunch and think that the complaints you see there are representative of the overall population. They're not. I'd bet at least 90% of Dropbox users don't know either exist. They didn't know there was a change of terms, they don't even know Dropbox has a blog.

I don't think anything has slid out of control for Dropbox. They're simply making an incremental improvement to their Terms for the 10% of users who do care, the same way they would any small feature.