I came here to report on this very issue, but saw this topic, so I am here to contribute.
Packanack has been the most obvious place to abuse this for me, but I have yet to try it on other maps. Basically, on Packanack, you can swim to a rock in the northern lake and a counselor will barely climb upon the edge of it, unable to climb any more. It's truly "just enough" for them to get on. However, Jason can't climb on at all. All he can do is let the counselor live, or attempt to snipe them with Knives from the shoreline, which is very difficult given the distance. It's possible as I tested this with a friend, but you'd need a lot of knives just to line up the shot right and then hope the counselor doesn't move around or has first aid on hand.
I'll be happy to provide screenshots if necessary.