What line would you draw between the technology existing and being useful to society and people's fundamental and inalienable right to refuse ever having it used on them?

Following their original thread, how would you feel if the government decided that this could be used for criminal correction, or if a company made going through a quick brain cleanse a part of the hiring process, or a college part of it's onboarding, or the military a part of boot camp?

Do we clean every spot to flawless similarity or just clean the bad thoughts?

If the latter, who gets to decide what the bad thoughts are?