I would want a way to turn this off. In the rare cases I travel cross country I get on the CB radio and ask a trucker if they are OK with me drafting following close to their trailer to save on fuel. It is more dangerous as it requires paying close attention to their brake lights and knowing they can use Jake brakes that won't activate the lights not to mention most trailers have a mostly for looks crash bar but I have a truck and won't go under their trailer. I have my own techniques for making this safer such as listening for the Jakes at least on the older rigs. Either way I would not want to lose this option. If a computer is involved unlikely I would have one then it should have a drafting mode. I suppose they can't call it that since drafting is illegal.