I do consider myself responsible and I can absolutely recommend that somebody does use a speaker tap cable to drive headphones as long as the amp is of adequate quality and performing within specification. I can't guarantee that a user will make a mistake, but the person who sells you a car can't guarantee that you won't speed and kill yourself either. Risk is up to the user to accept and mitigate.
You see, you recomend, iam not. The thema is discussed, everybody should do what they like to do. I feel saver not to recomend.