One clear danger is that they may alienate customers, who will welcome better service but may be more doubtful about uses of the technology such as finely segmenting the market or targeting customers individually.

ECONOMIST: Always-on people

Because the danger obviously comes from, not the 76 per cent who welcome it, but if the 20 per cent will become 76 per cent if it doesn't work.

BBC: News | BREAKFAST WITH FROST | Interview with Prime Minister Tony Blair