A: Because we're allergic to silence. Our ears are constantly on the verge of bleeding from the cacophony of screams, screeches, and wailing.
If you can't handle the noise, we won't judge you. Actually, we'll judge you. But we'll still be noisy about it.
A: Don't bother. You'll stick out like a silent sore thumb in our midst. We have no patience for quiet. If you can't bring the noise, you might as well just be a regular goblin. Or not. We're not really sure. Ask the Joining The Fun page for more info.