It's not just +, it's the invasive nature of all social sites and where it's going. Pretty soon, no soliciting signs will mean less than they do now, your phone number will be available to all and sundry, and your personal time will not be your own.
I got on this kick when kid was a baby. I got tired of having people knock at the door, or telephone when caring for her. I don't forget, and some I haven't forgiven.
Google hid the logout icon with big notices to join + on the PC. Sometimes you couldn't get around it and had to close the browser. (I delete everything on close) That was almost 2 years ago and I'm still annoyed.
Google needs to get over this kick and break up its services. If you guys think + is so great, you would be welcome to use it in any way you saw fit. Those who are not interested, can tell + where to go.
You are mostly male, and sites that women use are a bit different. I quilt, and a bigger bunch of old biddies I have never seen. They can get personal fast about your family life. I do read the sites for info on some problems, but -----I'd rather argue with an Apple fanboi.
If this + is a marketing ploy, it will be interesting. I just saw an article where a Pinterest pin means more to a merchant than a Facebook like. Pinterest seems to have cornered that bit of nonsense. Messiest site I've seen but very popular.