I Got Banned For Trying Destory Diamond Block?

[Fuuchouin]

what the hell  why did i get banned?

[Winniedoxie]

I found no bans under the username Fuuchouin. What's your in-game name?

[Xeadin]

Sounds to me like the title is saying that you admitted to griefing a structure that didn't belong to you. Maybe you should read the signs at spawn before touching other's belongings.

It seems like you may have triggered a grieftrap, but that is still in question until you give us your in-game username. Better yet:
check out this topic to find out why you're banned and how long you have until the ban expires.