If I was forced to pick one particular topic that I feel people should not ever play with is the idea of eugenics. I feel that very single person is an individual, with their own thoughts and preferences. There shouldn't be a rule or set of rules that dedicate what the majority or the few elite feel is better or more improved, or that it can benefit society. I feel that it is the uniqueness, regardless or good or bad, that makes up society and gives it meaning. But, the question of eugenics should be pondered in reference to other controversies as well. Since the idea of living differently is what gives a person their uniqueness, it renders the controversies void and depletes the meaning or argument. There will be no winner or loser at the end. I feel that these issues are only problems that people should address and acknowledge, but instead of claiming whether the controversy is ethical or not, people should focus on more substantial issues that they can fix, like ending world hunger. Issues like these are more direct and narrow, and they generally don't have objections.
For me personally, I don't think issues can be considered morally wrong. Morals depend largely upon the culture and personally ideology that the person feels is right for their morals. I think that very single person has different morals. The idea of a set of 'right morals' excludes the idea of liberty from our lives. Instead of thinking that we live under a set of morals, think that we live under a set of responsibilities that apply to every single person to ensure the overall welfare of people.