I don't see the problem either - granted they could be made a bit less obtrusive but there are plenty of more obvious eyesores in the countryside, like:
huge aluminium roofed 'barns'
7-bedroom barn conversions which look like a conference-centre with just enough traditional barn features retained to satisfy the planners, and 1/2 an acre of shingle car park out in front.
windmills (though I personally accept them as a lesser evil than traditional power stations).
If you're going to object to a relatively small box on a gatepost, then someone else might reasonably object to you parking an old caravan on your land and using it as a shed, or any other addition that can be seen from the road/footpath.
That said:-
maybe they should just make an application for android and apple that records gps co-ordinates and times - simple, portable, upgradeable and useable anywhere and on any trail they choose!?
Baz
A good idea, but I think those things use the cellphone masts to navigate rather than true GPS - I hear that some people who try to use 'em in the countryside get lost when they lose their phone signal.
