getting booted for inactivity
It’s the character moving around or using skills that the game sees. I’ve gotten the warning in WvW when looking in my bank or crafting for a while. The rules there seem to be more strict than PvE.
If you get the warning you can move your character over and that resets it.
Yup, once I got that warning inside an activity when I was just chatting, so I wasn’t “really” inactive although my char wasn’t moving indeed.