I agree with bobbi-j and aart. Apparently your rooster is mean. Think about why you don't want him. For those exact same reasons, other people wouldn't want him either, and it actually makes me glad the 4-H kid turned him down because I sure wouldn't want anyone to get hurt, especially not a child.
If you really don't want him, offer him for free, or just a couple of dollars. Don't worry about someone else putting him in the stew pot. There are SO MANY roosters out there who are *NOT* mean. If someone is going to keep a rooster they are better off keeping one of those; if someone is going to eat one, the best kind are the mean ones.