no, no, no. Reddit's Razor: if a corporation could be doing something evil, they are doing that something.
Their iphone app used to slurp up your data without authorization: http://arstechnica.com/apple/2012/06/your-iphone-calendar-is...
Furthermore:
LinkedIn: The Creepiest Social Network
https://news.ycombinator.com/item?id=5680680
LinkedIn opts 100 million users into sharing information with ads
https://news.ycombinator.com/item?id=2872030
LinkedIn is Evil