I think multiple ID is a working idea. We have used it in safe location sharing WATN: http://servletsuite.blogspot.com/2011/10/where-are-they-now.html http://se

I think multiple ID is a working idea. We have used it in safe location sharing WATN: http://servletsuite.blogspot.com/2011/10/where-are-they-now.html http://servletsuite.blogspot.com/2011/10/where-are-they-now.... And yes, it is good for users but bad for advertisers