Some people will appear just long enough to stir up trouble and disappear afterwards. This is referred to as "disruptive editing". Many times, it will not be necessary to take action against them. When it does becomes necessary to block a user, use the following rules when setting the duration. Administrators should not issue a block in retaliation or as punishment, just as a means of discouraging further repetition of the poor edits. However, administrators should be aware that by the third time a person causes a problem, they are usually behaving in a deliberate manner and will need to have a much longer block set on their account or IP address.