<i>It also allows you to exit any interest group you don’t want to be in.</i><p>How about <i>all</i> interest groups?<p>But Google will likely still track you --- in case you should ever change your mind --- or in case one of their "associates" should offer to pay for access for purposes other than ads.<p>Hopefully, this can all be circumvented easily enough in 3rd party phone ROMs.