G+ actively enforced this policy in a way that made people angry. When FB does similar things [1][2] people are similarly upset, but when they were going through early adoption they didn't force this.
[1] http://thinkprogress.org/economy/2015/07/04/3676529/truth-be...
[2] https://www.facebook.com/chris.cox/posts/10101301777354543