What I can see is, this site has a hacker that has a hard on for this site, primarily because the coding is older and there are no moderators to undo do the damage every day.
Hacking any website, is a crime by the way.
The ratings are being hacked by a troll.
The site has been hit with a DoS attack recently.
Hackers are typically male, not female because coding does not interest women.
There is female influence targeting ratings contestants, she tells the hacker who she hates, he does it.
The way you beat this is to bypass the ratings, create a new thread and everyone cast their vote one star through ten. The hacker is powerless to stop it.
OR
Keep the existing format in place, but have moderators deleting the hacks daily.