system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do researchers who do tests on mice have to comply with strict ethical regulations, and yet it is legal for me to use mousetraps and very painful poisons to remove them from my house?
gpt
Research is just highly regulated in that any research animal must be treated with the utmost respect and dignity because its life provides us with valuable information that helps either their species or ours. 

Pest animals are slightly different in that they have the potential to carry disease, so they must be removed from the home or else you/your family is at risk. 

Poisons aren't the most humane things, but the snap traps are actually very humane and cause instant death through severing the spinal cord. They actually use snap traps in field research.