if the person they reported was found not to be in any violation, yes the person who reported it would receive a warning for report button abuse.
Ok but what's about others involved in that thread.
No one gets a warning unless they do something wrong.
Why are you so concerned?
I ask because i don't want any warning if i am involved in that banned thread without any violation by me.
The mods aren't idiots. They know what they're doing. Stop being so overly concerned about it.