[larister]

I was just about to and then realised that I had turned it off a while ago. The fact that I had completely forgotten it shows that I don't need this data.

However, it's also not something I'm hugely concerned about; as others have said the main danger is from some unscrupulous individual gaining access to your account. In terms of Google having access to my data, I would imagine my data will never be seen by human eyes. Having said that, one does need to remember the inherent permanence of data on the internet, as Facebook's timeline has shown sometimes your data can surface in unexpected ways.

[facorreia]

You don't need it, but it makes search matching more efficient for the people that have it on.