<i>&gt; extracted from my address book</i><p>This is why nothing like linked-in gets anywhere near my address book, and therefore nowhere near my portable devices because the only way to install the phone app is to agree to that permission and the site itself is terrible on mobile.<p>If you let an app install that asks for permission to read your address book assume it will one day it <i>will</i> spam everyone in it and if someone in your address book also uses the app assume that the linking information will be used for profiling purposes (which means more advertising by one of many means).<p>And any who gives a web app their email address &amp; password to access their mail account to look for contacts (seriously, I know people who have done this and <i>damn well should know better</i>) they need a good smack up the back of the head with the security clue stick.