... unless there is no other way to solve the matter. The person that's been insulting and rude etc. may turn around and wanting to appologize. Don't deny people this. Especially as a Christian we are to forgive those that wronged us. Better option is to describe the issue to the person on a PM and telling him or her that you will have to block unless there is no change in behavior.
Christ love,
P
Christ love,
P