Ooooooooooookayyyyyyyyyyyy, here's some big text to hopefully make this sink in a little.
If you see something wrong, REPORT IT.
DO NOT POST. It's spam. Informing people "Hey man your post is in the wrong spot" is not your job, it's the moderators' job. That's mini-modding and you can and will get in trouble for it (ask around).
Proper course of action is as follows
Step 1: Report the thread by clicking the "report" button at the bottom of the offending post.
Step 2: GO AWAY
It's that simple. Does it say post anywhere? No. It doesn't. ;/