First and foremost, if you don't have a plan for the cockerels don't hatch any eggs. They are your responsibility, act responsibly.
While you can eat any chicken of any age and sex, some breeds and crosses are going to give you some pretty small chickens. Still, people eat quail and they are pretty small. One option with unwanted males is to eat them at some point.
Another option is to kill unwanted males and dispose of the body. A lot of breeders and hatcheries do that with males and also unwanted females.
Depending on your set-up and how many you have you may be able to keep a few with your flock. This is more of an option for rural areas where space is plentiful, it will not work nearly as well in suburbia for several reasons.
You can create a bachelor pad, keep the males in their own flock. With no females to fight over they are generally peaceful. You have to build the extra facilities and feed non-productive chickens but you have that option.
You can try to sell or give them away. Realize when you do that you have lost control of their future. They are likely to be eaten.