The Internet Archive is attempting to preserve the content of public Google+ content on its Wayback Machine all before Google+ shuts down in April.
As usual, if you do not want this archived, you can remove your Google+ account. Of course, if it's already archived in the Wayback Machine database you'll have to go through the removal procedure from the Internet Archive. [help.archive.org]
Find out more from the post on ths topic [reddit.com...]
I missed this on the 18th ... generally pass over g+ messages. Not surprised wayback is working overtime, then again, I am surprised that g even allows it.
A zillion hears ago I roboted archive.org from any of my sites (they do honor that!) and even removed the content they already had on hand when I did robot.txt them on older sites. So, in that regard I have some respect for archive.org.