Board Thread:News and Announcements/@comment-4842918-20131112111150/@comment-4842918-20150403101454

Go to the user's page. Click "User contributions", then "Block".

Afterwards, you'll see an interface that asks you how long the block duration is. If possible, all vandals must be set for not less than 1000 years. Because they're just trolls. They're scrap. You can also choose the reasons as shown.

"Inserting nonsense/gibberish into pages". That's the reason.

Have you caught up?