I'll just go ahead and say I was having problems in addressing a few members of FlyerTalk because I was relying in their last visit date as a reference point for a comment or action. In my research, I discovered that in "invisible" mode, the last visit time and date was not recorded and it lead to a series of somewhat incoherrent conversations base on an incomplete record of time on FlyerTalk. It was becoming somewhat a problem. And the first thought in my mind was -- why the heck would anyone really need to be invisible?