DA's the TMA ed's abbrev for sites of "debatable antiquity", sites that are truly questionable. But mebbe describing them as a "duck's-arse of a site" might be a much better idea in some of the cases!
But.....
Paulus....
some of us think you're just as guilty in some cases.....
such as this one....
http://www.themodernantiquarian.com/site/5841
As you say yourself "there are no other examples of cup and rings in this part of the country".
Then there's all of those holy wells you've posted.
;o)
http://www.aveburytours.co.uk/DA.jpg
?