Some have inquired about the twitter box option at the top of the "Latest Activity" section. Apparently, it was an automatic update by Ning. Your privacy is still safe. It's an option for those who connect their personal account here and sync it with their personal twitter account.

If they choose to do so, they are able to share their OWN personal update on twitter by selecting that box before they share their personal update (and nobody else's) here. I hope this clears up any confusion on potential privacy complications. I have attached an image below for reference.