Board Thread:Manga/@comment-27321453-20181008195355/@comment-1327106-20181022011912

It depends on what information the Survey Corps (or their rebellious soldiers) released. If Zeke's name and identity is unknown to the general populace, you'll probably get the same blank reaction as you would if you asked a random person IRL where Zeke Yeager is.

None of the civilians screaming outside the military headquarters mention him, only Eren, so chances are nobody other than the SC, former or current, knows about Zeke. Which means randomly asking people would probably result in nothing in particular. And this may be intentional on the part of Eren's rebels as well, because they have their own plans.

The only way I could see potentially critical damage from Gabi and Falco's escape happening is in the direction the series is already going. If Gabi and Falco get in contact with other Marleyans, they might be able to start something.

We know Nicolo and others like him are on the island working as indentured (or low-paying) labor of some kind. Meeting the kids might be enough to spur the former Marleyan soldiers to take action when the military does not expect it, especially if the former soldiers have been behaving as though they've been mentally worn down over the past few years.