The court was very well aware that in a context where there is an absolute rule, but exceptions are being created, one exception could lead to another. In this matter, as my colleague said, no matter where we draw the line, there will always be people on either side of the line. Those who are excluded may always ask to be included.
We cannot foresee everything that may happen. However, if Parliament describes its objective clearly, the reasons that underlie it as well as the limits and the grounds that justify those limits, this will at least provide a context in which to study the cases that will come up. All that said, we cannot predict the future.