I would like to take a moment today to talk about G+ and Facebook. The two look similar on a first glance but are very different below the surface.
Facebook lets you connect with people you know, and until recently only let you friend people by mutual consent.
G+ on the other hand allows you to watch the public activity of any one you want.
This difference is subtle but it puts a value on being interesting. On G+ if you say interesting things or create good content you get a following.
This encourages people to be polite, engaging, and interesting, and if you are these things you will be rewarded with attention.