For the past five years, Rainbow Six Siege has been the only game that gets me paranoid about cheaters. It’s not something that comes up in every match I play, but when I do see something suspicious from an enemy or teammate, it’s all I can think about. I spend the rest of the match looking for signs, examining their profile, and deliberating on whether or not I should report them.
The problem is that cheating can be really hard to detect in Siege, where a normal round often includes non-cheaters using sound and game sense to headshot someone straight through a wall.
Source: N4G PC Rainbow Six Siege's match replay tool is a cheater's worst nightmare