I understand what you mean. Some people may be offended by seeing it. Gravesend and headstones can make people uneasy.
If you are wanting to share it on social media maybe only share to a certain audience as I know you can click on the post settings. Maybe if you just have certain people you want to share it with then send it via inbox.
A good tip if you want to share is write a post first something like
"I recently took a photograph of me by my grandfather's grave. I know some people are uneasy with such images so I have posted the image in the comments below. If you wish to have a look.please do so"
And then you put the image in the 1st comment. That way no one can actually see the image unless they chose to look in your comments.
I hope this helps vpdro