Unity chat limits / removals.

[Dzspdref]

What if they are chatting in town in Unity chat for 30 mins (it never happens, but can do I suppose) and don't zone?

Then when they STOP chatting in town, THAT'S when the timer starts. The kickout timer would start when they enter a zone, or stop chatting.
And if they zone within 30 minutes, or chat in that time, their timer resets. THAT'S why I said either/or.
Yeah but likely if they are in unity chat for 30 minutes and not doing anything, then they should just go to LS or /tell. Or go find something to do. Even on Asura, I NEVER see people chatting in Unity unless it is to complete ROV objectives... "Hello!"