IMO this is something which ought to be written into law. It'd be easy to implement a kill switch, and would actually encourage innovation, as people would feel more empowered to experiment with the technology.
Absolutely, and I would make it a bit broader: Anything that automatically charges a client a variable amount should have a maximum-spend limit that the client can set, and it should default to a reasonable number based on the client's expected usage.
In fact, you could even just change that to any auto-billing service or product and the default for constant-charge services would simply be the amount of the constant charge.
Yes. And the law would simply state that the customer may not be billed more than that maximum for the service period. Up to the business to restrict their use of the service, if they want to.
If it's really so 'complicated' that that part can't be done, well, I'm sure it would suddenly become a business priority to cut off use when the limit is hit, if the business can't charge for it.
