I get why they’re doing it. Really. Google is integrated its well received Plus product into its general search results. The feature is called: Search, plus Your World (SPYW).
Yes, it’s easy to disable with a single click, but it just doesn’t feel right. I could handle the “real-time search” feature, especially after Google couldn’t gobble up Twitter. That made sense to me.
On this one, though. I’m just not feeling it. And the government is also looking at this carefully.
For a longer take on why this is a bad idea, read Steven Levy’s piece.