natecochrane writes "An Australian bank has raised the possibility of offering better deals to customers who share its social network activities with it. But at the same security conference at which Commonwealth Bank's CIO made the suggestion, another speaker, security guru Bruce Schneier, warned of the dangers of vendor lock-in. Would you trust your bank — or any institution — to be the gatekeeper for your private data and thoughts in return for a cheaper mortgage or percentage points off your credit card?"
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