Well for one like FFS said, corners should be creeping. Most of the time, the batters are showing bunt early, then pulling back as the pitcher starts in her windmill. I instruct our corners to focus on the hands while creeping forward, if they see movement from the hands pulling the bat back they stop immediately. I've seen corners charging so hard when a bunt is shown (I'm talking showing early, not a late showing like a drag) they are like 10 feet from the batter when the pitch arrives. So if your teaching your corners to crash that hard, I'm going to use the counter to that. Why should I give your defense the advantage?
I put this into the category like slappers. You never know if they are going to drag, hit a chopper, or power slap. I've seen plenty of slappers hit a linedrive shot by F5.
Offense -- I am not a fan of 'bunt n slash' and do not utilize it on offense. We use small ball, slapping, and traditional hitting, but not 'bunt n slash'.
Defense -- We have played many teams that do use 'bunt n slash'. So we teach 3b and 1b to creep as CoachKevin has explained. We also do what we can to scout our opponents in an attempt to learn coaching or player tendencies. We can utilize that information for defensive placement.
Note: I personally grew up playing baseball. As others have stated, a hitter attempting a 'bunt n slash' would eventually catch a fastball to the ribs.