Model culling for player models when clipping through other models
Player models can poke out through thinner models or walls, which can be detrimental when people get spotted through thin structures because their model was sticking out unknowingly.
I don't know how feasible this is but games like CSGO do something similar by culling the part of the model sticking into something else, meaning you'll rarely if ever spot someone because the corner they were in happened to be part of thin cover.