Question on discord ban

Hey,

a user on another leftie discord told me about this community here and I was interested so I decided to check out the Discord link in your sidebar.

After I joined, only two channels were visible and I decided to write a short greeting in one of them. A few hours later when I checked back I was met with the message that I was banned.

I don't really understand why I was banned and I just wanted to check out your community because it seemed like an interesting place. I did not join with any bad intentions. Could you tell me what I did wrong?