Ask HN: What is wrong with the online networking scene?

How do you feel about online networking? We (i.e. my startup team) have mixed emotions.

We feel that "social" and "professional" networking should not exist as separate entities.

Facebook recently disabled a LinkedIn app for their users. One Facebook user commented:

"Yep. All my profile tabs are back to the default. I really liked this app, and it came in useful on more than one occasion. Seems the more FB tries to make itself "social" the more it limits the way people can interact (Or punishes them when they do)..."

(You can click on the tab near the top that says, "Just My LinkedIn Profile," to see some of the reactions: http://www.facebook.com/applications/My_LinkedIn_Profile/6394109615)

Any thoughts on this?

What other problems need to be addressed?