In the past the team has said "you can recognize outcasts because their faces have been on wanted posters" to justify the tag. Which means realistically, having an outcast tag would mean everyone would know their names too. Because they saw it on the wanted poster.
The roleplay surrounding outcasts also invites metagaming. I've watched people stand around Adelyn before because they broke her disguise, didn't know the character name and didn't know how to identify them, but saw the outcast tag and RP around that. It was extremely awkward.
Personally I try to not roleplay the outcast tag because it's so wonky. But now I'm being put into a position where I have to call it something. I'm opting with "men and women who live in the underdark," but a lot of people go with "marked outcast" like it's a tattoo like Sencliff pirates have. It may as well be "bright pink outcast badge".
The tag and the mechanics surrounding it should be changed to something more RPable. Or just remove the visibility of it all together. Arelith is full of people who like to play spy, let them investigate.