I sort of disagree with Draven here about what the ARB says. It says MWE's might not oppose sleep when the recipient REQUESTED it, or the use of one command effect to end another command effect. Reading through the rest of section, its very clear that MWE's are extremely in to consent when it comes to free will. More or less, if the effect is removing a creatures free will, MWE's should strongly oppose it. Quoting: "Mystic Wood elves are very strong believers in freedom, and as such are opposed to slavery and anything that removes free will." So if effect you are doing is mind affecting and you think if you asked the target normally if they would want to consent to the effect being done on them that they would say "no", it should be against the MWE roleplaying.
The rulebook clearly lays out that the MWE culture debates if this applies to enemies and monsters; and that some racist MWE's may consider other races inherently monsters; so you could legitimately play a MWE who only viewed other MWE's as people and could freely use command effects across all non-MWE targets. But it'd be an entire character concept choice, not just a "I want to use this one skill" choice.
That's what the rulebook says - I know some of the ARC have much chosen to not take this stringently since it is not a hard prohibition, or interpreted the option to be an extreme racist as a way to say that MWE's don't have a limitation. But I think that RP limitation is just as restrictive to play, even if it is a bit different.
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I mean, I think there's actually some interesting potential RP around why don't MWE's object to paralysis, bind&pin, prison, and other effects that prevent you from acting. I mean, I know what my character would say. My personal RP is a lot about mental freedom, not physical freedom. And each time a creature is mentally controlled, it is minor degradation of their free will. Even when done beneficially - which is why Awaken is so problematic. But this is a personal take, and not canon. (Also, MWE child care, in the context of free will and not imposing on it, and when does a child become considered a person and their free will should not be impinged upon gets fascinating. Is it problematic to make a kid go to bed on time, or not allow them to go outside, or make them do chores?)