Personally, this doesn't bother me too much. I use LinkedIn specifically because it is public. I'm an "open kimono" type of person. Not particularly interested in hiding stuff.

However, the general principle of "Data Scraping as a Business Model" bothers me. This is by no means the only company that does it (I suspect that MS does it with their access to LinkedIn).

There are far more egregious instances, and many of them have ways to get users to voluntarily cede information (can you think of a rather obvious example?).

LinkedIn is a sandwich board. It's meant to be a public showcase. If you want private, I suspect there are much more focused (and probably valuable) venues that cater to particular communities.