Is 3I/ATLAS, the latest interstellar object, an alien spaceship?

Spotted by astronomers last month, interstellar object 3I/ATLAS [NASA] is the third object from beyond that we've detected passing through the solar system. Given that its trajectory does not intersect with Earth's orbit, it "poses no threat to Earth and will remain far away," NASA states. It has been suggested elsewhere, however, that this isn't true i…