A simple edit that will allow you to display members showing/selecting to go invisible in the members sideblock. Simply paste the following into your EXTRA.CSS Template and you'll notice the opacity lowered for those members, any usergroup that choose to go invisible. (Invisibility is show in the screenshot on the left). This is a very simple edit and thought it might be useful for those that want to move away from the default different colour solution default to xenforo. Code: .sidebar .invisible { opacity: 0.3; }
Normally you do get to see who's surfing in invisible mode but once you start applying styling to the usergroups I'm quite sure you loose the invisible user styling and it inherits the usergroup styling unless specified. I could be wrong in that assumption though but this now let's me know who's lurking.