There's no such thing as too far. If it works it's funny, if it doesn't work it's too far, it's stupid. Really there's no such thing as "too far." You're joining the politically correct when you use words like "too far." You don't want to join the army of politically correct.
There's an army story in me, and I think there's a WWII Brooks film somewhere.
I was in the army, and to me it was like a newsreel.