I didn't find topics with users ideas, so I considered to write it here. What you are thinking that zombies must be stinky? It may became new realistic feature in game. Survivor can get debuff like "pong" if contacting with zombies (fight/ walk or stand near zombies). If you continue contact - with time that debuff increasing and can became a couse of queasiness or headpain (or something else).  Corpses can make such effect that stimulate survivor take away corpses.   Sorry f