a number of writers have criticised the narrative that hails the kinder scout trespass as being, according to historian david hey, "a simple explanation of the triumph of the 'right to roam' movement" when, on balance, it did "more harm than good". they point to the real controversy over the trespass at the time that was commonly used by opponents of the access movement as an argument for denying access even into the 1950s and 1960s which, according to philip day of the manchester ramblers' federation, brought a "positive hindrance" to the efforts of the movement. other writers such as tom stephenson have challenged the assertion that the trespassers had even reached the summit of kinder scout and only made it so high as ashop head. john k walton has questioned the absolutism of this revisionism and advocated for a post-revisionist stance on the mass trespass which might acknowledge some of the positive effects that the trespass' publicity had for the access campaign in both the short term immediacy and its symbolic role in the access campaign over the rest of the century that led to the crow act.