Yes, I don't like that sort of.... Why ask people something where you're giving them an incentive not to tell the truth? I don't see any particular value in that. I think that should be related to coming back. I do think if somebody doesn't come back for x number of years, whatever intention they expressed probably doesn't make all that much difference.
Again, this is not an area I have done research on or am particularly knowledgeable about. I'm giving you a personal opinion, which is no better than anybody else's.