If you're dealing with short hopped Bairs, shield, wait until hitbox ends, drop shield --> jab before he lands on the ground. Same thing Snakes do with Ftilt/Utilt. It works, got NoJ with it pretty good last Saturday. If they are spacing you well enough, just back off. It's not like he can camp you forever. Oh wait, sausages (>.>). Seriously though, shield it, shield drop and jab. You can sometimes punish after the landing portion as well, but that depends. If your shield is low, back off and space him right back. Fair > Turtle.
Oh, and Kimchi, did you know M2K sandbags in friendlies? Apparently EVERYONE knows that. I also hear he likes to play mindgames with people and order 12 soft shell taco supremes from Taco Bell while he Dair camps you.