It's funny and ironic how people fight over grind spots during xp events.
They want to grind during the xp events to get it over with faster, but their nature of defending their spots or getting revenge on people who stole their spots can make them take more time to do their grinding than if they'd just used an instanced dungeon to grind in, or sometimes, hilariously even - just grinded at their spot when it's *not* during an xp event.