>I don't want anybody tracking what websites I visit, articles I read or facebook videos I watch.

This whole thing is opt-in, is it not? If you don't want to share your information, you simply do not opt-in.

I'm replying to the person who used Dropbox as an example of "Some people do want others to have their data." in order to clear up their confusion.

> These are two VERY different definitions of "data", mingling the two is not helpful to discourse.

Indeed, data has complex nuances that are sometimes missed.

Let’s not mingle data intended for advertisement with data intended for social science research.

> Let’s not mingle data intended for advertisement with data intended for social science research.

Well those are two different USAGES of the same type of data (tracking). That one is good and the other bad is a different discussion.

> That one is good and the other bad is a different discussion.

In my estimation, that is the current discussion.