circles

I'd like to modify the default User Locations so as to avoid any user addresses being given away. I realise I can prevent zooming, but still results in too much information being given out.

One thing I saw years ago was using maps with quantities centred on UK postcodes (although could be cities, countries, etc.) with a bigger diameter circle meaning more people were based there. You had to draw the biggest circles first, but it looked really good and gives a great view of where your members are based without given much away about their actual location.

Received invite today. I'm a long-term gmail user but got scared while building my google+ "circles". This is a great user interface but I'm just not comfortable sharing my relationships with Google's core.

Since federal agencies can access these records without a warrant or notification, why should I make it easier for them? (Even though I am a law abiding citizen.)