Hang on a minute,
I agree that it's a modern thing but as to it's suitability for TMA?
If it's not suitable for TMA why did you post it?
I would suggest you posted it for the same reason that I posted a picture of it. It's a beautiful megalithic oddity which sits amongst other oddities and shows a continuity of use of Stanton Moor and it's many rocks.
It is a lovely eccentricity and to cull it would be a shame.