You are ignoring the real problem here. The problem is "people who are inconvenienced by their smoke detectors such as an alarm going off when toast is burnt, tend to disable them - leading to death. How do we solve this?" Its quite obvious the solution isn't "Don't disable them" because if it was I'm sure nest's product wouldn't exist.
As a product designer, its very hard to change human behavior. If humans are disabling smoke detectors because they are inconvenienced, either the product is wrong, or user education is wrong. I'm hard pressed to believe you are going to educate people to not disable their smoke detectors while cooking, when people still by and large drive without seatbelts.