Just changing the zone would do nothing for people who blindly dial back without even checking the number. What we need is a system to report the per-minute cos

Just changing the zone would do nothing for people who blindly dial back without even checking the number. What we need is a system to report the per-minute cost of an outgoing call, and being able to block any call above that limit (like, set the limit to $0.00/min and you can only call numbers included in your plan). But of course carriers wouldn't want that, not only because it would make consumers painfully aware of how much their calls cost, but also because they are profiting from these scams.