The analogy doesn't really hold. Even if the alien species was a thousand times more advanced than us they'd still be curious. Why? Because a worm doesn't try and talk to us. But we have ducking countless communication signals up there, including multiple that are designed solely to try and communicate with aliens. If a planet full of worms was bombarding my space craft with rf signals of all sorts, id damn well go take a boo. Maybe they have observed us and realized we wouldn't be able to coexist?
Mi think its more like a stray dog on the street, nipping and barking at your legs... Either you pet it or you kick it but i doubt youd ignore it.