text: If your guestbook was written by you then include a check to see where the user is coming from (check the IP) and disable the guestbook for people coming from that address.\n\nIf your guestbook is not written by you, the only course you have is to complain to his ISP which can be found by tracing his IP address, but you need to know what it is.\nGo to http://www.dnsstuff.com/ and enter the IP numbers to find out the company to contact.