Bind Hide Other Players (Key Bindings --> UI Toggles) to a button of your choice, but do not use Alt in any way.
- Whenever you're in a populated zone, raiding or rifting in Ashora, simply press enter while holding down the bind to open the chat box, then release the bind.
- You should now have every PC hidden on your screen*.
- Press enter a second time to close the chat box and continue about with more fps.
*Everytime someone logs in or zones in near you, they'll appear on your screen while the rest are still hidden. Simply press your bind to show everyone again and repeat again to hide as necessary.