I just realised how useful this little kit is.
At the start of the game I just leap around and place those little trinkets on every “monument” that the FT will visit. Never place them on the ground because they have a sphere radius, place them on buildings.
I can’t adress how many times mudded players got spotted by them and how easy was for me to track them, they really deserve to be used and are a big help to the game.
The FT will never destroy them or not even spot them although they do a sound when triggered.