Obviously the Fry/Hawking Hole Theory isn't quite clear. The hole was not a window into the future, but a window into the past. The people in the present (the future) were stripped of Fry's presence but not his history as history is generally unchangable. Thus, they would have no memories of Fry, but the effects of his existence would still be present. Bender actually destroyed the Universe when he threw his beer bottle throught the hole and sufficiently changed the past to the point where history no longer matched the present.
If you understood this lecture, I'm very proud of you.
You would have to be a total sucker, because this has been a complete load.