Do they actually require it? I've noticed that Waze, for instance, will default to rerouting you if you don't respond to the prompt. Which is great - they seem

Do they actually require it? I've noticed that Waze, for instance, will default to rerouting you if you don't respond to the prompt. Which is great - they seem to have taken into account the fact that folk might be driving, so let's just keep getting them there as fast as possible.