When you ignore a member that member is still able to start a personal conversation with you however you will not see said conversation sent to you. I would have thought it would return some type of error to that member when they try and send the personal conversation.
Yes I thought about that but I have seen other forum software that would return a message to that member something like "Sorry X does not receive private messages from members " or something to that effect. By getting nothing at all the member sending the message will become aware that they being ignored by the simple fact that no reply was returned. I am just not sure what is worse knowing that you cannot send a message to that member or waiting around for days for a response and you get nothing