Do you consider the tactics used by the " Dog Whisperer " to be a bit unethical?  

We have a pack of 12.
I am the leader.
Do I dominate? Sure, I have too.
With out a leader there would be chaos.
Look at a wolf pack. How many leaders do we see? One.

Milan is the leader of his group and he shows them leadership and love and respect and so on.
Using a choke chain, as noted by another, there is a wrong way and a right way.
Milan uses verbal corrections and leash corrections, depending on the dog and the problem.
Not sure how many have been next to or behind a K9 dog in training, but the use of a choke chain and strong leash is the one and only thing that a trainer has to control the dog with at times.

Voice commands are fine, but when a dog reaches a point they do not hear any more and need a physical correction.

Using the chain and leash saves one from a reaction or adrenaline bite.
I have had a few bite me, not in anger but merely a reaction, the K9 dogs in training, because I used my hand to get their attention and not the leash and collar.

Any reputable and knowledgeable trainer will adjust the methods used on a dog.
We also should remember that dogs bodies have evolved from mostly working dogs and the shoulder and neck area are very strong and resilient and a tug now and again on a choke chain, properly sized and fitted, will do no harm.

The same is true of pinch collars. They are a tool, to be used with dogs that do not understand the corrections with a choke chain. People will leave the pinch on and it is not fitted corrected and it serves no use. Used properly it serves to re-enforce what is being taught and then when the lesson is learned the collar should be removed and not used again, unless there is a relapse in the learning.