LOL...they have the ability to think about the consequences, they just think that they don't apply to them . It's experience that teaches us that no, we are not exempt from the same consequences as everyone else who does what we do.

My only concern for just changing everything at home without getting them involved in the decision (and their agreement to participate willingly) is that they may eat low carb/high fat at home, but high carb everywhere else which would be setting them up for some health problems down the road. Even kids are not exempt from the problems that high fat/high carb causes.
Just my nickel's worth...