I live in Byfield, the next village to Culworth (pronounced Cul'uth by older locals).
It's a great song and tune but rather immoral in that most local villages were just as poor 2-3 hundred years ago but didn't turn to robbery. Why celebrate the ones that did? Also,the Culworth gang,as I understand, were widely hated as they stole from anyone, not just the rich.
They were also quite leniently treated--only two ringleaders were hanged(at Northampton, near the present racecourse),one was transported to Australia (almost as bad in those days)but most got fairly short prison sentences.
BTW,"Danetree" is no longer used in speech but still occurs in the titles of local businesses,eg "Danetree Stationers".