To a certain extent yes. There should exist boundaries defined by society as to how far we can take science.

While this may seem rather subjective as a whole, since ethical, is merely a man-made definition of what is right and what is wrong, it does make sense to say when to stop. Some things should be left alone, or not experimented on.

No matter how you see it, it will be inhumane. Test on volunteer subjects and people will tell you to do it on animals. Do it on animals and people will say, people should volunteer.


Either way, its boils down to the same thing : Progress cannot happen without sacrifice, no matter how unethical it is, if it benefits everyone in the long run, then meh.

I believe that, in the case of free-will ; it cannot be justified that it is unethical because one has already volunteered him/herself. In fact, that person should be lauded for giving to society, or so to speak.