But on a related topic I think we really should start seriously considering whether we should postpone certain paths of research instead of just doing things because we can. Too often we are doing things just because the technology is ready. Whether society and laws are ready, doesn't even get a consideration.
For example: the creation of viable human-animal hybrids may be possible in the future. Same goes for certain mixtures of human, cyborg, animals, AIs etc. But if we are not ready to decide whether to give such entities (and which entities) the same rights AND responsibilities AND penalties as humans then we really shouldn't go down these paths yet. e.g. how do we decide that some entity is legally human or not?
There are other nonrelated paths of research but with similar problems of whether we really should do them yet. In many cases the benefit to harm ratio would still be rather low.
It's not like we have infinite resources, and there are plenty of more useful things to do research on. So why not do those first then do the other stuff later once we've figured out how to deal with the issues. It's not like some game where if we screw up, we can restore from a savepoint and do other research/tech paths first.
Researching into giving everyone a tool that could kill everyone else in an instant may be a bad idea if we haven't got to the stage where none of us will use it to kill whether on purpose or by accident. That of course is a big stretch, but supposedly it doesn't take very much money and resources to create a deadly virus that will kill many millions of people.
 Yes I know humans are animals too, so if you don't know what I mean by "animal" then you should realize the problem even more.