This is a fun little way to mess with one of your enemies. =)

What you do - you launch an attack from a city you will turn into an npc (for instance, if you're flipping a flat, and are going to make an NPC).

This is usually a worker (feel free to camp it!) After you launch, abandon the city.

The person you launched at will see an incoming attack (that dang chicken will be flashing), and see it coming from the coords of an NPC.

The hit will land, and NO report will be generated by either side, but the birdy will flash until either the worker hits, or until maintenance comes, or until the person you're attacking logs on/off.

So have fun annoying your enemey.