NOTE:If someone bothers you , the chat window comes with couple protection features on it.  First you can disable someone against you. Just click on the nick name and click on the button which is upper right hand corner of chat window.  The picture looks like a ear which has a line on it.  Also you can make someone more visible for you.  For to do this click on the nick name and go upper left hand corner and click on the button which is on the second place from left side.  Have fun...