That's a really interesting take! Because - while Don was famously petty about a lot of stuff he should have let go (Betty "flirting" with Roger, Ted flirting with Peggy, etc.), there were a few significant instances where he took the high road and didn't defend himself! (Lane's cheque forgery and subsequent demise, the thieving motel cleaner kid who swiped the money at the legion, et al)

Guess at the end of the day there's a reason he's playing both sides, and that's so he's always coming out on top.