Dont know if it is the exact same in SR4A english but the french version say that
"Spirit can use their powers on any character
moving into the line of sight."
Wich basically can mean :
1- Spirits can't use their power against character that are in their line of sight but aren't moving.
2- Spirits doesn't benefit from their ITNW power against attack from people that are not in their line of sight.
3- Spirits doesn't benefit from their ITNW agains't static weaponnay as they are not moving...
I am joking, but some of the rules really really really should have benefitted from a bit of editing.
