From what I've seen, muzzle is very immature. He used to be a nice, friendly and calm guy, but he turned into a complete jackass and troll.
For example, someone had a weird fetish, muzzle added him and made fun of it. I personally don't see muzzle on our servers anymore, but that might be because I live in a different country.
Nevertheless, I decided to throw a -1 at muzzle for his immaturity/immature actions. I might change my mind if he becomes more mature.