If by invisible you're simply referring to the collection of pixels above a character's head, then yes. 'Tis certainly a grave crime to deprive the rest of the game of viewing that small little OOC nametag above your character's avatar. That's the only thing that's changing for other people.
Think of the way your character would see it. They don't see the pixels. They just see the same group of people who travel around usually in a group together, and seem to spend a great deal of time together. If PS ever manages to get to the level that character's faces can be customized to a recognizable level, you'll see the nametags, and guildtags above your character disappear.
So, really, nothing's changing.
I'm still debating sigging your line, for everyone's enjoyment.