It happens, especially late at night. But usually when I report chat offenders, I get "This person has already been punished" as my response. I would say there is a mod on kit at least 80% of the time. And even when there is a mod on, they don't catch every single thing. Especially when they are trying to focus on like catching hackers, doing appeals/reports on forums, maybe even playing the game like a normal player. Mods can't read every single chat message, and rely on people making reports to get the ones they miss.