Thanks. Good point that it might not be original to FaG, and I would not assume it is.
I like the handy FaG citation. They even highlight the whole thing for you with a single click anywhere on it. I paste them in the sources, then remove the annoying space before the final period, then replace 'Find A Grave Memorial no. xxxxxxx' with the FindAGrave template. I usually add a brief note about whether the memorial has images or other sources, complete dates or just years on the headstone, etc.