Gosh that would actually be scary. But the bigger the size the more resources they would need to live. It’s very hard to imagine another reason besides leeching Earth. It’s not like humans are a peaceful race. As soon as they give us the knowledge to reach the skies we will have Space Police killing alien teens around the universe. “ Oh the tentacle looked like a particle beam rifle “
by the size of their ship.
It might not even be a ship.
If it's huge like in Hollywood movies where it towers a whole town, they will definitely have bad intentions towards us.
Twilight Zone's "To Serve Man" doesn't seem so bad, it's practically the Soylent Green solution.
