No, but I might have previously liked or commented on a vlog by another gay or transgender person which is suddenly publicly tied to my regular Google account. Or I might have expressed a political opinion which isn't going to get me persecuted but might alienate a manager at work or a relative.

And yeah, there's ways of preventing this but they're pretty difficult to figure out (the Google+ page route) and it's fairly easy to make a mistake. Especially if they keep changing things.