Google is today making a change to Gmail that will further bake in Google+ to its webmail product in a way that’s actually somewhat practical, though also potentially invasive. Going forward, you’ll now be able to directly email your Google+ contacts from Gmail, even if you don’t know their email address. And by default, anyone on Google+ will be able to email you as well, thanks to this new option, if you don’t adjust your settings.
Yes, of course the default for this feature is on: Google wants more social data to flow into its data centres, because it needs to know more about you to deliver more “relevant” search results (and, by the way, ads).
While I’m comfortable with this kind of thing, the assumption that it should be default-on is exactly the reason I’m gradually weening myself off Google’s services.