I am a Facebook guy. I rarely use Google+ and almost always ignore the notifications from it. After seeing a strange notification of a picture I had taken, I got a shock of my life to find out that some of the pictures I had taken from my phone was secretly uploaded to Google+ using "Instant Upload". WTF...
You should check your Google+ account as well. The pictures can be found by hovering over the Photos menu in the left hand side of the Google+ web page and then selecting Instant Upload. The good news is, its not shared yet...
So here is how you turn off Google's "Instant Upload". I would call it "Secret Upload".
Step 1: Launch the Google+ app on you phone
Step 2: Click on the Menu option(or the 3 dots in Android 4.0 or above) and select Settings
Step 3: Click on "Instant Upload"
Step 4: Turn it Off
Google+ Instant Upload on Android |