I find it strange that people have such strong opinions on something that they obviously don't have any first hand experience with? If it hurts a cock to be dubbed so bad, I wonder why after you toss one back down on the ground right after dubbing, all they want to do is crow, top hens, and generally act "cocky"...
As for frostbite, long earlobes, wattles, and tall straight combs can get frostbitten very easy under the right conditions. I can just about guarantee almost everyone here that has a large straight combed rooster that spends any time out in the yard in the winter has had some degree of frostbite. Remember how your rooster had very sharp points when it was just a stag, and now they are kinda rounded off? That is because the tips get burnt off in the winter. That is a very minor frostbite, but still frostbite. There was a nice article in a fairly recent issue of backyard poultry magazine on dubbing if anyone is interested in learning about this.

