I guess so is running people off the road if you do not like the way they drive. Train horns are retarded, I hope all that gets them gets their vehicle impounded.
Completely different. One you are simply bringing their attention back to driving, the other you are intentionally causing them physical harm. Running someone off the road is a criminal act.
I'm not a believer in train horns. I think a lot of people just use them to pull up on folks walking to scare the crap out of them. But, I do also think that a normal horn doesn't cause a break in a distracted driver. Something louder than the norm does. For example, a police siren, fire engine horn, etc, causes a driver to look around and be aware of their surroundings. If that saves a life, then I am game.
Guess you'd need to see the aftermath of what's caused by drivers who text and end up killing or hurting people.