For you personally, to solve this issue in particular? Use Firefox. Google is evil, and there's a good chunk of the Chrome team who are actively enemy combatants.
For the broader issue of not wanting to give even the information you'd need to choose to share to LinkedIn? Network the good ol' fashioned way: talking to random strangers in San Francisco bars.
For the broader issue of not wanting to give even the information you'd need to choose to share to LinkedIn? Network the good ol' fashioned way: talking to random strangers in San Francisco bars.