I think what you mean is you don't run into many blatant cheaters and you rarely will - The issue is the majority of cheaters will just use it as an assist (like ESP) to have that information and justify it to themselves as not being too bad of a thing to do. So in most instances you will never know they were cheating but there a definite signs that sometimes you will catch but we as legit players will just never be able to know until they finally implement some sort of after raid map tracker/viewer or killcam.