What's the deal with Legacy tattoos? After I stopped playing FFXIV around 1.23 I haven't kept up with the news, betas, or anything till about a month ago when I downloaded the ARR benchmark/character creator. So I wasn't even aware of the tattoo till I saw something about 'em on these forums.

Is the Legacy tattoo something all pre-2.0 characters are supposed to have? Or is it optional? Do you have to put it on your character during character creation?