Originally Posted by
Happy Humphrey
Strictly speaking, you're correct. But then, footpaths aren't meant for people to picnic on, or run up and down for sports training, or take photos, or look through binoculars on either. Would you advocate asking permission for such activities, and then post notices at each end of the path? I'm not even sure that a landowner could actually stop you geocaching (permission or not) unless he can quote a bylaw that prevents it.
A reasonable landowner would understand that a few people walking along and occasionally stopping to sign a log book (or have a cup of tea) are doing no harm, and the impact is too trivial to require admin. Even if people step on to the verge of the path, or rummage in the hawthorn a bit. The problem tends to be in explaining that, effectively, that's all there is to the average countryside geocache. The actual container is normally invisible, and is easily removed so is not relevant (assuming it's sensibly-placed); it's all about access for cache seekers.
But perhaps you have a particular point to make?