Great idea but useless pretty much atm as can't edit them/add to topics and the popular tags sideblock displays tags from private areas to everyone guests and all.

If you are unable to edit/add tags, I guess you have not installed this patch...

http://community.invisionpower.com/resources/documentation/index.html/_/knowledge-base/323-upgrader-driver-error-topic-starter-only-can-edit-tags-r640

Ah legend thanks very much for that I had not seen it cheers. ;)