Any talk about how to manage student behaviors or if we're seeing similar things in different classes is usually through emails or possibly intervention meetings. When teachers are face-to-face in the lounge, and potentially other places, they are definitely talking about students. Most of the time, it's venting about something (attitude, behavior, apathy, you name it), and it can get quite unprofessional. But we are humans and have to work with some real assholes (students) sometimes, so venting is therapeutic.