Good news we’ve recently fixed this. Head into Forum settings, display tab and untick social sharing options :)
@Domas Sabockis (and for anyone with the same Pinterest problem in their Forum) unchecking the social sharing options does not remove the Pinterest "Save" option that occurs when hovering the mouse over an image in the your Wix website forum.
This Pinterest "Save" should turn off when social sharing is unticked, but it is not. It is a bug and needs to be solved by Wix.
EDIT [4Feb19]: Wix has fixed this on my site; I hope they have fixed it on yours.
Hi, I have the same problem. Although the "pin it" option is unticked there still appears on all the photos in my blog. How to solve it???