Reading it again, I think the new rule can only apply to land the MoD owns (i.e. one of the three Dartmoor Ranges) and that the geocaching powers that be have jumped the gun somewhat, as per usual. This is sometimes why I wish Dartmoor had it’s own body (such as letterboxing) as it such a special case, rather than abiding by the central rules which are not tailored to our situation (e.g. over a century of letterboxing, one of the last wildernesses in the UK, the land not belonging to the MoD and historical public access).
I think the issue has to be one of land ownership, really, which is fair enough. If the MoD does not want caches on it’s land (Willsworthy) then that has to be respected, although since the MoD is a public body and I can see no benefits in denying the sport, then I am strongly opposed to this.
It hurts the military’s public relations, and I know of many people who went on to serve in the forces only after a lot of time spent on the moors in younger years.
National security can apply to areas on or near bases I would agree, but to apply that to Dartmoor as a whole is absolutely ludicrous. There have been no incidences of “suspicious packages” on the moor, and neither will there ever be, they are well aware of letterboxing/geocaching.
As a side note, it is disappointing that geocaching and letterboxing communities on the moor are so distant from each other, as many people do both. When I meet people letterboxing on the moor they are the nicest people, and yet there seems to be some resentment by certain individuals of geocaching.