Sandra Laville, crime correspondent for The Guardian:
The Metropolitan police said emails were sent out to 1,136 victims, mostly of car theft or pickpockets, as part of a survey on 30 January. But the addresses were put in the wrong section of the email, which meant they were shared with other victims.
While New Google and Facebook are taking the headlines, I'd still argue the biggest threat to online privacy still comes from people misusing IT (and from Sherlock). Part of the solution is education and effective oversight, but even then we're all prone to making mistakes, and our software isn't perfect.
Perhaps the Metropolitan Police should look into using email clients with stricter field validation!