I don't think it'll be a problem forcing experiments on them
if catching, restraining and jailing them wasn't possible then they'd be walking free
i'm sure they'd get sedated and then strapped to a bed or experimented on in an induced coma
for feedback, well, for example, if they wanted to test a new eye shadow out on an inmate, after application if the eyeballs fell out that's all the feedback they need. they wouldn't need the inmate to lie about how it brings out the blue in their eyes and highlights their face over all