To me it sounded like there is a special ECU controlling the VCS thingie that is recording the data in case the airbag goes off. Not sure how you want to remove this device without compromising the safety of the car.
I personally do not like Toyotas approach either. After all, this is my property and I do not like when people just do whatever they think is right with my stuff. On the other hand, these data might come in handy, you never know. I personally think they should ask for your concent, like with the donor thing.