That is one of the many concerns that has been flagged, as people have tried to imagine the ways in which this isn't just theoretical but would actually play out in real lives, in real ways, for people. That particular example, which I've heard referred to previously, is a very good one. It underscores why the importance of having some sort of discretionary relief open in a circumstance like that is an admirable and necessary goal. It ensures that we're not seeing injustices or unfair decisions that are made in cases like that, with no ability to rectify it or remedy it.
On October 31st, 2012. See this statement in context.