Kevin: The Daily Mail 'reveals' how companies such as BT and Carphone Warehouse are 'spying' on customers by monitoring what people are saying about them on social networks. The Daily Mail quotes privacy advocates saying that this could be a breach of data protection legislation. If I publish something publicly on the internet, I have no expectation that this data is private.
This is a great blog post looking at all of the analytics technology that The Daily Mail uses to monitor traffic and respond to comments. Much of The Daily Mail's moralistic campaigning trade on hypocrisy so this all comes pretty much in line with my expectations. The difference now is that there are a lot more people watching the watchers.