Becoming "Incapacitated" would not give any wounds like KO does with Concussion.
Incapacitated characters are treated same as KO, they can be looted but can't be attacked further (unless they chose to forsake their OWN protection by activating Murderous Rage within past 24 hours), but players with Rage unlocked and Criminal Acts on, and animals with "Execute" ability, can perform a "Knock Down" -action to forcibly faceplant Incapacitated character to the ground (leaves "Stink of Battery"), taking the same KO penalties (Concussion) as if they had been directly KO'd.
Pros:
- No excessive punishment from not treating application of leeches like it's brain surgery.
- Could add various sources of SHP damage in the world without excessive punishment through Concussion.
Cons:
- Snail will probably figure out a way this helps at killing sprucecaps.