Research requires ethical practices to be put into place. You have to have an ethics review and people have to be informed of what they're about to endure in anything when it involves human research. I know people would like certain research to be conducted. It's precluded by the ethics requirements that are lawfully in place for very good reason. It would be difficult to get experiments that are not under controlled circumstances. That's just the way it is.
On February 25th, 2008. See this statement in context.