[asherkin]

Cheats have been doing this since before I was part of the SM community (the technique is called "silent aim"), it just makes them nicer to use for the player as their screen isn't snapping all over the place constantly - the correct angles are still being sent to the server.
AFAIK SMAC does not, and never has had, any heuristic aimbot detections like snap detection - the eye angles checks are for detecting anti-aimbot features, not aimbots.