I enjoy participating in life liberation (if it is done in a way that does not cause endangerment in the eco system) as the activity help to nuture compassion and plants a seed of goodness. I think you will want to save someone's life if you know that they waiting to be killed. Neither do you want to eat your parents or friends??
Anyway rearing animals are also not good for the eco system.
It will be good to become a vegetarian. Because when one release an animal, still another animal will be slaughtered in its place. The greatest compassion is to be able to help all sentient beings be liberated from the six realms.