I tried today to log in my private mail and it asked me to verify it by mobile phone. I was a bit surpsired because I tried many black hat methods in my life, but nevber any spam/anything regarding google. So when I finally loged in I saw that some viagra advertisements were sent to everyone in my contact list, and before google marked it as spam and didn't deliver it to my contacts some people did receive it. Fuck I was so nervous about it, but now I am surprised how canny some people can be! So remember - try to keep all your private things as secret as it is possible!