Don't tell the aliens we're here. Well, what do you think?

If there were aliens living on another planet, then it would not be smart to try to make contact with them. These aliens may not be kind and may only want to use Earth’s resources and then leave. They would use the resources to build more spaceships and harness and control power. They could also harness the suns power to create a wormhole. Humans would not be able to survive and aliens would be able to take over Earth.