Emma Watson

The 'Harry Potter' actress explained that she opts to turn down requests for selfies in public as "it's the difference between being able to have a life and not".

She told Vanity Fair: "If someone takes a photograph of me and posts it, within two seconds they've created a marker of exactly where I am within 10 metres. They can see what I'm wearing and who I'm with. I just can't give that tracking data."