Necropolis discussions.

Those who steal arrows have an advantage: they can do it from a distance. This is dangerous for ranged units.

In reality, practice has not confirmed the "danger" of ghosts to ranged units -
firstly, as correctly noted above, you need to destroy the ammunition cart first;
secondly, ghosts must fly close enough to the ranged units and spend a turn doing so (and although the theft of ammunition is done from a distance, this distance allows ranged units to shoot at the ghosts without penalty), and the theft will only begin on the next turn (if they survive until then :smile10:);
thirdly, this ability does not work if the opponent has the "Magnificent Quiver" artifact.