Scout used to list everyone inside a zone rectangle, sometimes more than two hundred tiles. It now lists only the characters standing on the same square as you, and an attack on anyone off your square is refused.

Two rules go with that. Any valid region allows PvP on your tile, whether or not that region has zone geometry, so there is nowhere you can stand and be safe. Being idle is not protection either: if you are awake and standing there, you can be attacked.