I believe that was because the evidence portrayed in that particular case was not conclusive. Apparently Jagex is either unaware of the situation, or there is no wrongdoing. I may be wrong though.
I found f15t guthix stunning skeletons under the mage's guild while doing a clue scroll and tried talking to him, after no response i proceeded to do emotes in front of him for around 10 minutes
After that I finally got a response and he said "Sorry I had my public chat turned off" and you can't autocast stun and on another note who can stun for 10 hours in a day its not like alching where