Why report it? How would you even prove someone's doing it to deliberately avoid the auto kick? I mean I'm absolutely certain some are, but I've also gone afk while talking to my retainers and gotten distracted only come back hours later just plain having forgotten I was still logged in : p
It is weird that it prevents the auto kick, but honestly there's so much weird about how this game works sometimes that it's not even that surprising. I'd be less than surprised to find out this is a "can't fix it without breaking something else" situation tbh.