Tired of your npcs being farmed by someone who appears to never sleep? Try this:
Monitor the farmers population - if it doesn't change he is not recruiting so probably afk (but, strangely, still farming). Pick your time then capture one of the npcs and teleport it away and capture the flat and recall.
If it is a level5 then the absent minded farmer will send transporters and ballistae to attack a lvl5 flat; wait for the plunder report!
If the flat was plundered but not captured he is maxed out on valleys - relieve him of one (or many if he has more than one city nearby).
Sooner or later he will capture the flat and, too add to the strange behaviuor, he will leave his trans and balls there.
So now there is a flat with a weak but expensive force sitting in it right beside your city - don't think I need to spell out the next step :)
It costs a teleport but the satisfaction of catching a cheat and making him pay where it hurts - in the resource department - is deep.

