Ban

From Graal Bible

A ban is an administrative mechanism intended to selectively prevent access to Graal systems. To ban is to apply such a mechanism. As a user, you can be banned from the forums, from an individual playerworld or, in extreme cases, from the entirety of Graal itself.

Usually it is possible to evade bans by using a different account, but some types of ban can target an IP address/range or computer ID.