It's pretty funny.
>Go on /r9k/
>Take some random ass thread
>Copy and paste it on wizchan
>"OMG I SAW THIS EXACT SAME POST ON /r9k/!!"
How the fuck would they even know?
On the flip site
>See I thread I don't like
>Copy and paste it on /r9k/
>Post in the original thread saying this was on /r9k/ with link to the thread I made
>People start getting mad at OP and derail the thread.