There can be a number of different reasons why members would like to look "offline". It can range from needing some space while reading/posting to not wanting their username to show up in the list of members who are currently online. There could be safety issues members have with IRL people and they may not want them to know they are online here. I don't think anyone who wishes to keep themselves invisible is trying to do it to be mean and trick anyone....it's just a personal preference about using an option this program provides

BTW, all team members are ALWAYS visible.....we don't have the option of being invisible......it would kinda defeat our purpose no?