IMO
They should be informed why they were muted.
Agreed, I remember reporting gldnbb for his nonsense one night, logged in the next day to find out I was banned for 7.6 days. No indication from HTC as to why, no response to emails, no phone calls answered. Had to find out on the forums that anyone that reported him that night was muted for 8 days. I can understand trying to prevent mass reporting for no reason, but when you have access to the chat logs atleast check them before muting the reporters.