Seems like a pretty basic maneuver to try and pull off. The zombies don’t show any interest in something that isn’t up, moving, and clearly alive, so a smart (or panicked) survivor would think to take advantage of this by just…not moving. Laying on the ground, maybe hiding among some other bodies to try and cover one’s self. This wold also give scent an increased importance, and give the traits for light scent some real power.
If you’re cornered and can’t fight, or you would really rather just play it safe, you play dead and let them pass, or maybe shove yourself into a bush. Then you just wait, and if the enemy takes notice or goes hostile, it alerts you like it does normally. Otherwise you can just hold up and wait for darkness or for an opportunity to slip away.
There should also probably be better ways to cover one’s scent in a pinch, like smearing dirt or blood all over yourself to try and mask it before doing so. Boomer bile could be pretty useful in this way, seeing as it doesn’t alert the horde to your presence like in Left4Dead.
Maybe this works for animals too. Deer in particular are pretty flighty, so if you can cover your scent and remain hidden and wait for them to get a little bit too close…an addition of bait would also be nice for this.
Just thought of it as I envisioned my character waking up in a hospital under the Abandoned starting scenario. Sometimes there are zombies in the room with you and an unarmed, sickly, confused, and frightened survivor would typically take advantage of their such things if they’re trapped. Would definitely spice things up a bit in game.