Huh? I mean, I know that rule is from Pathfinder, but isn't the whole premise of the objection to the taunt ability that the GM decides what it is reasonable for NPCs to do, in all circumstances?
Also, what do you mean by "misused"?
That's crazy talk!
In the original OA, published in 1985, two classes - the Kensai and the Samurai - have the ability to cause fear at will. Not because they are magicians, but because they are fierce warriors. And of course this has the affected NPCs put their lives in danger - they either surrender (which is a way of putting one's life in danger) or turn and flee (which is a different way of putting one's life in danger). From pp 17, 22:
At 7th level . . . [the kensai] also causes fear the same as a samurai . . .
At 6th level the appearance of the samurai can cause fear in all creatures with 1 HD or less (saving throw versus breath weapon is allowed). The samurai can control this power, turning it on and off (as it ware) at will. Any characters or creatures struck by fear flee from the samurai or surrender to him, depending on the circumstances. A creature that passes its saving throw is immune to this effect for the remainder of the encounter.
And more generally, I don't understand why a warrior who is able to taunt and intimidate,
wouldn't be able to goad another into putting their life in danger. I mean, this is a thing that happens
all the time in the real world. Why is it not a thing that can happen in the fiction of the game?
So why are Sneak Attack, Extra Attack, Cunning Action etc special abilities?
Can anyone try and strike with advantage from behind (a thing real people do in the real world), try and strike more blows, try and duck into cover really quickly, etc?
And what about spells? For instance, does the existence of the cleric class mean that no one else can pray to the gods for help?
So in another recent thread that you've participated in, much virtual ink was spilled by some posters, who play a lot of 5e D&D, arguing that the GM can always veto any player action declaration to ensure consistency with genre, the GM's conception of the hidden fiction, etc. Why would that not apply to this mooted ability?
Between your post and
@Oofta's quoted just above, I'm trying to work out whether you think 5e GMs have the power of "rulings not rules", or not?