The thing is, with Facebook, we all knew it was mostly public information and that you'd be a dolt to reveal everything sensitive about yourself in your profile. Most people instinctively know to leave certain tidbits about themselves off of their FB profile.
Whereas with LinkedIn, we are willing to give up much more sensitive and accurate profile data, such as all of our past employers, addresses, phone, email, birthdate, professional experience, headshot, school information, coworkers, etc.
The initial content of a typical LinkedIn profile is much more rich than a starter FB profile. There is no need-to-know for Facebook to have as much "real" information about you as LinkedIn has. I feel that LinkedIn got in through the backdoor with the information most people have provided to it. Though Facebook undoubtedly has more of your day-to-day activities than LinkedIn, which might be more dangerous.
I never personally got suckered into a Facebook profile, one of those (lucky) few that have continued to live on planet earth without a FB account. But LinkedIn is another story, I totally got swooped up in that one for sure.
In my experience, people do not always "instinctively leave certain tidbits" off of Facebook - in fact, people often feel like Facebook is in many ways a private space. Like "it's just my friends," even though the friends and friends of friends circles are massive, not to mention privacy controls that make many things public by default. Also, FB prompts for things like employment history and educational history in the same way as LinkedIn, but goes further to ask for personal info, geographic history (where all have you lived), etc.
Combine all this with the fact that there are so many FB users and many of them are children who wouldn't otherwise have a LinkedIn account (and are more comfortable with sharing personal info online).
So, while I agree that LinkedIn is in the group of data collectors, I don't think they're quite on the scale of FB.
Whereas with LinkedIn, we are willing to give up much more sensitive and accurate profile data, such as all of our past employers, addresses, phone, email, birthdate, professional experience, headshot, school information, coworkers, etc.
The initial content of a typical LinkedIn profile is much more rich than a starter FB profile. There is no need-to-know for Facebook to have as much "real" information about you as LinkedIn has. I feel that LinkedIn got in through the backdoor with the information most people have provided to it. Though Facebook undoubtedly has more of your day-to-day activities than LinkedIn, which might be more dangerous.
I never personally got suckered into a Facebook profile, one of those (lucky) few that have continued to live on planet earth without a FB account. But LinkedIn is another story, I totally got swooped up in that one for sure.