Works for all WoW client versions!
This addon will make you automatically spit on anyone in the enemy faction who dies in your vicinity. In a battleground this will turn you into a spitting machine gun.
Type "/autospit" to see how many people you've spat on.
Source: https://github.com/techiew/WoW-Addons
Seems Blizzard intend to remove the /spit emote in the future, so this addon might stop working I guess.