I tend to agree that no sane person with minimal technical knowledge would balk at this.
I already know that Yahoo! sells the email addresses of the people I exchange even one email with to LinkedIn and I am repulsed by this. LI then turns around and offers them as connections. I should note I am always logged out from LI to prevent even more evil from them. LI is just evil and should be eradicated.
I highly doubt Yahoo is selling your e-mail contacts to LI. Do you have any proof or citations? I suspect either you authorized LI in the past (and forgot it's still authorized), or your contacts have authorized LI so it's pulling in their e-mails with you, not yours.
I think you might be forgetting that by e-mailing said person, you become part of their contacts too. Should that person decide to import or sync their contacts in linkedin, a relationship between you and that person is established on their server. ie: it's an _undirected_ edge between you and your contact, which they seem to use to display stuff back to you.
These "social" big data companies have a history of doing evil (or sometimes, stepping right up to that line) and $LKND certainly isn't in business to be altruistic.
I thank you for providing examples that prove my point. :) That's mostly speculation along the lines of "evil could have been done, therefore evil must have been done".
I already know that Yahoo! sells the email addresses of the people I exchange even one email with to LinkedIn and I am repulsed by this. LI then turns around and offers them as connections. I should note I am always logged out from LI to prevent even more evil from them. LI is just evil and should be eradicated.