What a disgusting group of bottom-feeders LinkedIn has become. Question is: if I install this unwittingly and they do something to my email server side later-on (not that they have been accused of other vaguely unethical things) how much are they protected by the EULA?

FYI, in the state of NJ, not even your employer has the right to do many things with your work email. They recently decided this. I would love to the impending lawsuit with LinkedIn for similar reasons, but just for advertising.