I too have killed and buried nasty cockerels, especially the bantams, who hardly have any meat for the freezer. I do sell nice cockerels, and some do have good homes. Feeding a family is not a bad end, for a bird who's had a nice life until that last few minutes. Much better than those poor commercial meat birds!
Human aggressive birds do not get rehomed here! In the past, I tried to 'reform' a few, and rehomed two of them, and in hindsight, am glad that nobody else was injured, and no lawsuits came of sending a nasty bird away.
Mary