True, assuming she ever got them to cooperate, otherwise she's doing exactly as they have. My point is forcing them into it would make her the same as them. Now, if they were to submit willingly, it would just be harmless fun. However, I don't see willing submission happening since, you know, they would be submitting to the very people they enslave by force, which is not a good look for them among their supporters on the pro-slavery side.
On a side note, I just came up with an idea, use this as part of a political campaign. Not propaganda posters, I mean actual photo evidence. The pro-slavery crowd would drop them very quickly as they would see this submission with zero context and, assuming the evidence is made correctly, would be made to believe they are doing it willingly whether they are or not.