That depends on a simple question: who determines how the character affected reacts; the effect or the effected?
Now I have no problem with a warrior having effects that provide debuffs, but I have a MAJOR issue with abilities that control thier actions. My cowardly rogue doesn't give two spits about honor, so any ability that says he's going to rush up and engage the warrior in melee is mind control; you are now playing my character. If it's magic (like compelled duel) at least I can say the magic overrode his personality by charming him, but with a purely "nonmagical" effect? No.
The other issue is that any effect that you give a PC is, in theory, usable against a PC. So really think of you want a warrior to nonmagically cause your barbarian to throw down his weapon in surrender, your wizard to charge a knight with his quarterstaff in melee, or your cleric to void his bowels and run away after seeing the rogue get critted. Likewise, I don't care how persuasive your charming con man is, I don't like the idea he can override my character's personality and beliefs to be taken advantage of. Because you're crossing the line from me playing my character how I feel is in character and going into me running a toon in a game.
Martials should get nice toys. Playing my PC (or NPCs) for me shouldn't be one of them.