How about the ratio between people who post and troll/spam flaggers, the thread will be locked.
Example:
Thread: ololol bc'ers are greedddy
Poster 1 posts
Poster 2 posts
Poster 3 posts
Poster 2 and 3 flags for spam.
a 2:3 ratio.
a high enough ratio, the thread gets deleted.
Just adding on to your idea.
I support. |