It seems that the most famous e-mail can send you behind the rails. And as an example and real fact, see what happened to a US user from Massachusetts.
A friend request email to social network Google+, sent by user Thomas Gagnon to his ex-girlfriend while there was already a restraining order against him, was the reason. When his ex-girlfriend received the invitation, she went to the police reporting Mr. Gagnon for violating the restraining order by Mission of email. The police agreed, arrested him and jailed him to be released later on $500 bail.
So here you tell us that there is no great news. Yet the news is that Mr. Thomas Gagnon claimed he did not send this email - invitation, but Google+ itself, since we all know that the company is sending invitations to gmail your contacts (recently he even made it officially known) in order to increase the movement of its network.
We do not know which theory is the truth, but if Google+ acted autonomously, the otherwise otherwise sympathetic company may put you in trouble
We thank her warmly SecTeam @giorgos.