How much is too much?
There are many horse trainers in this world, and very few train the same way, so many methods get argued over. So, how much is too much when training a horse, in your opinion? If a horse bites you, some people may smack/punch in the face/nose, others may yell at the horse, and yet others may just give the muzzle a light push. And a kick, people could kick the horse back, or smack them on their back legs, just shove them, or not do anything. There are these and more, so please, tell me how much you think is too much, as I have met people who just LOVE their horse so much, they would rather let the horse trample them, and try to buck them off, rather than to smack the horse, or even just correct it with the required amount of force.
If I was to get bitten by a horse, yes, I would smack their muzzle, and I was kicked, I would kick, or smack there butt/back legs. Immediately after though, I would go back and pet the horse, and make sure they aren't shy around that area. Would I beat the horse with a whip? No. But whatever you can do with your bare hands, and flats of your boots is nothing compared to what would happen if this behavior had been directed towards another, more dominant horse, so yes, I would smack my horse if his/her behavior warranted it.