A repeated hacking attempt on a koi board! Strange. Guess you did not know how valuable your trade secrets are, Brian.
There are some boards with a few high-emotion posters who become embroiled in conflict. I can understand that when one of those experiences a hacker problem it could be related to the feuding. This is such a courteous board, I cannot imagine any reason someone would want to cause it grief. I think I will assume it was overly mischievous kids having fun and just hope that their energy is expended elsewhere.
