What should scientists stay away from researching or experimenting?

Up to me such people are not to be considered as scientists. They may be well versed in science but there needs some qualification in everything even in experiments or research. Experimenting or researching is good but the question is for what sake?If the experiments are for good things and for the people good it is called as the experiments and they doers are called as scientists, if it is for money purposes it is called sin or evil act and the doers are called as sinners or evil not scientists.

I have acutally heard of that and i think one of those experiments would include cloning beings. May it be human or animal beings. Some people would say that its actually a good thing because it could just save a persons life like those who experince accidents and would be needing transplants of organ, doctors would just use cloned organs to tranplant to the needing patient so that they wont have to take it from another person. But in some movies i have seen, it was really possible to just easily clone any being and play god deciding whether who lives and dies.
From the cost of transplanting cloned organs doctors are alreay playing god since the people who would be able to undego those transplant are those who are rich and who could afford because it would cost a fortune just to do those transplant of cloned organs.
With this could you also say that cloning is one way of playing god and deciding who lives and dies?

I think as a scientist, his or her responsibility is to try to improve our living conditions, improve our environment, or do something helpful and useful to the whole world, or somethings beneficial to our daily life.