We can't change anything here, Killian. If and when we disappear, we don't know what happens to us but nothing ever changes back home. No one notices we're gone. Whatever you tell me here has no bearing at all on what happens back home.
You were here before. My mom was here before. Belle was here a few times. It's been me and Baelfire mostly, then Henry came along just before I became the Dark One — here, not back in Storybrooke. And August a few months ago. None of them knew I was gone.