Hackers? Trolls? Or maybe... CATS!
Edit: Well this is "fun" I just got this while trying to go to the "Whose Who" board
Warning: Unknown(/home/virtual/site35/fst/var/www/html/forumdisplay.php): failed to open stream: Too many open files in system in Unknown on line 0
Warning: (null)(): Failed opening '/home/virtual/site35/fst/var/www/html/forumdisplay.php' for inclusion (include_path='.:/php/includes:/usr/share/php') in Unknown on line 0