It's been a while since I played this...and having it mentioned to me the other day I decided to give it another fire up - then realised the very reason I left it was because I was being attacked by something that had LOS (even though the "straight line of LOS seems to go through buildings and trees)...and I couldn't be afforded the same. Of course, that wasn't the only reason...an attention span of a gnat doesn't help

I don't mind if it's right and my interpretation is wrong...but it seems to me if something has Line of Sight to me, then it should work the other way
I'd be very interested to know the reason why not...and I mean that genuinely.
I've attached a save because I can't get a picture taken whilst in game (it just takes a picture of my desktop...seemingly ignoring the game...and that's even with my screen grabbing software)