Hmm... Alright, I retract my reasoning being based on being able to control an area, and instead suggest that the problem is that the ability not only stops foes, but damages their defenses and forces them to expose themselves to more attacks of opportunity (at a penalty to defense) to be able to continue moving.  "Don't fight the squishies!  Fight me!" is a lot different from "Idiot!  You wanted to go after the squishies?  Taste dirt!  Taste it again!  Want to get up?  Too bad!"  It gets very very frustrating, you see.  :-)<br/><br/>I think I can disallow large and in charge on the basis of being a 3.0 and not a 3.5 feat though, I'm pretty sure.