Sure, I'd support "self-experimentation sites" where experimental subjects bring their own drugs and get better supervision/instrumentation. Just like self-injection sites let people who already have heroin inject it there but don't provide it on-site.
Volunteering and bringing your own drugs with you is a much stronger signal of intent and capability than just volunteering. You don't need a large cohort to find exceptional effects, negative or positive, so the bias toward stronger filtering seems fine to me. If you're looking for subtler effects, self-selection won't work anyway; you'd need double blinded clinical trials like usual.
Volunteering and bringing your own drugs with you is a much stronger signal of intent and capability than just volunteering. You don't need a large cohort to find exceptional effects, negative or positive, so the bias toward stronger filtering seems fine to me. If you're looking for subtler effects, self-selection won't work anyway; you'd need double blinded clinical trials like usual.