So I was just sitting in PI and I randomly got this idea.
Going into portals in F3
Whoever is in that map will not see you there
Will not show the "CanineCat has arrived" thing either
You can watch whatever they are doing.
This can be good for Mods and Admins to make sure nothing bad is going on there.
You can see their chat aswell,
Its like your a ghost, its like your there, but your the only one who knows it.
I would really like this to be in the future