What about radio waves?

Is GPS tagging really the answer or just another knee-jerk campaign that unravels under scrutiny?

Apart from obvious ethical questions about the Orwellian road to authoritarianism, the rise of Big Brother etc, there's another more prosaic issue at stake here. GPS products can be easily blocked; by buildings, by bridges, even by the ubiquitous winter cloud cover. Radio waves are more reliable if you want to keep tabs on someone. Regarding the Alzheimer’s Society’s advocacy of tagging, it’s probably advisable for them to do thorough research into the technology before setting up a standard for the campaign ahead.