I've seen too many horses injured from hard tying. It cures the pulling back problem, but how do you know the horse won't have permanent damage to his neck, facial nerves, etc? There's also a risk of disfiguring the horse's face, even if you don't cause chronic pain. One of my mares had her nasal bone damaged by someone hard tying her, and now it is deformed and she has a white scar on her nose. I was told they regretted trying it because they had to call the vet...she injured her hind leg too.
You can see the divot in this pic, just above the power line in the photo:
I've never seen her pull back in 6 years, but I started tying her with a tie blocker ring and then began tying her with a regular lead line and safety knot when I knew she was safe.
I don't believe horses should be left alone when tied because they can't get away if something truly bad happens. My preference is also the tie blocker ring. Just use it for awhile, and then the horse will get over his claustrophobia about being trapped while tied, and stop pulling back. Soon you can tie regularly again. It shouldn't matter if the horse ever should get out of the tie blocker, because hopefully you don't leave him unattended in an unsafe place. I know people do, but it is not an ideal practice.
The horse has a reason that is logical to himself and doesn't have to do with game playing or other ideas humans come up with to explain horse behavior that is actually anthropomorphizing. If a horse pulls back because he knows he can get away, you just have to block the behavior safely until he gets over the habit. Make the tie blocker have a little more resistance. He's just choosing food/friends/rest over standing somewhere and either getting ridden, hungry or bored.
That is why you don't just tie by the neck, with a halter puller!
It is also why you make sure the horse understands how to give to pressure first, and that is easy to tell, just by leading and handling a horse.
I have never raised a halter puller, but I have cured a few that I bought that way, and prevented a horses from ever starting to halter pull, by using that body rope, first indication that they wanted to set back.
In fact, the body rope is illustrated in a veterinary book on raising horses, and I have used it on yeanlings, when I first taught them to stand tied
Used correctly, it is very safe and effective, and prevents all the strain from being on those neck muscles, should the horse st back, plus they sure as heck learn to come forward, and few will ever test that rope again
You can also tell if a horse is truly panicking, or is just using any excuse to set back, having learned to halter pull and get free
I find a horse that you can't tie, pretty useless
I know people that can't leave horse tied to a trailer at a show, but have to load and un load that horse, where no stalls are available, if they are showing his buddy, ect.
People that 'pretend, to tie the horse, just wrapping that lead shank around a rail, afraid to even go and sit a few feet away and eat lunch on a trail ride, holding that horse who won't tie