Encyclopedia Dramatica details how the star and flag system can also be manipulated by anyone else using a glitch with the IMG tag in signatures:
Easy CSRF Hack = Unlimited Stars and Flags
ATS is a custom coded site that has numerous gaping CSRF vulnerabilities. One of which easily allows you to nigger as many stars and flags as you want. All you need to do is star your own post, then copy the URL that appears in the address bar, and paste it into an [IMG] tag in your signature. Your sig will contain what looks like a broken image, but everyone who views your post will automatically be "starring" the post you linked to in the tag. Watch as your star count goes up by thousands in no time! You can also use this to get an insane amount of flags for your thread, and even unflag other members' threads that you disagree with!
Lots of members do this, but the mods are entirely oblivious to it because they are morons.
https://encyclopediadramatica.se/Above_Top_Secret