ERT is all about having a marked presence to be a deterrent. I think this suggestion is in the wrong direction completely.
As for civs saying they can see you, here’s a few tips:
- Set up after bends/ junctions, hide behind signs or bushes or inside parking lots or anywhere where they can’t see you until the last minute giving the vehicle little time to deviate.
- Set up on a road with no exits such as the motorway, that way there is no other route and the car must pass over your stingers.
Any other questions feel free to shoot them to me,
Kube