One example I've given is that it requires the victim to consent in advance to the information that's being shared with the offender. That's simply one example that could be implemented. I use that as an example because that would ensure that the victim is comfortable with the parameters.
Clearly, in cases where the victim and offender know each other and know where each other lives, a radius is pretty straightforward. The challenges arise when.... Let's take this city, for example. You have a population base of roughly 900,000. If you put a two-kilometre radius on that, you could potentially target an area for the offender, who may wish to reoffend, about a smaller area where the victim may reside. But the victim may be comfortable with saying, “I'm comfortable, if you tell them that they're not to be within this radius”.
I think one option is to seek consent from the victim as to what information can be shared in advance of its being shared with an offender. I realize there are people who perhaps have more experience than I do in the implementation of boundaries. For example, I know that in other countries boundaries are imposed in some situations. My concern is only that there be those appropriate administrative and procedural safeguards in place.