Horseback riding is like religion, the different sects being different training methods or disciplines. Everyone is so endowed to their view that sometimes it puts blinders on us and we are unable to see the value in other peoples view points. Personally I am new to the art of biting, I have always ridden my horses in a D-ring snaffle (or on my lazy days, a halter with reins attached lol). This has worked very well with the horses I have ridden, but I have always been intrigued by other methods. Bitless is not the end all. It is not the answer to all problems. It is also not something EVERYONE should try. Its an option, its a choice, not the only humane/correct option. I've ridden many horses and can name several off the top of my head that would fail miserably with a bitless option because of their dislike of facial and poll pressure. Conversely there are many horses that hate mouth pressure. The fact of the matter is that this thread has an extremely valid point in that harsh bits + harsh hands =harsh mouths and that you need to learn to ride with softness and treat the bit or lack there of as an aid, not the driving force behind riding. But the ideas that bitless is the best/only way to go is as foolish as saying that there's only one right religion for everyone in the world.
Conversely, I will NEVER be ok with a halter with thumbtacks. That's completely unnecessary and foolish. I'm sure you're going for the shock value there, congrats, you got me.