Since the earliest days of PT automation the mutes have been a stumbling block. Somehow even if mute automation is inactive on the automation panel, they get written. I, out of habit deactivate mute automation by going to medium track view, select mute automation view, and apply option/command on the mute button - this deactivates all mute automation, making it a stupid switch. There is a world where automated mutes are desirable, but in an environment where a single PT session is handled by many different users, moving to many different rooms, simplicity here is key. Why isn't this simpler, maybe a deactivate check box in the mix prefs?