I had to login to write this. Many people online have for various reasons difficulties understanding the consequences of things like these. By having risky options "Default is On" and "You can opt out" they will be tricked into allowing Google to use their name and picture in ads. A company claiming to act responsible and "Do no Evil" should not need to do questionable acts like these.
I know some telemarketers exploit this and sell their products to people with mental problems, dementia and what not. We all expect Facebook to con people into writing things they later on make publicly available. But for Google to take a step in the same direction is actually much worse since we are stupid enough to expect them to do no evil and therefore are more easily duped.