Evil is evil for many different reasons, it could be because of revenge, because it gives them a place in the world, or because of the money. In some cases it just depends on perspective, that is why...
Alchemy is an ancient term which included all manner of things we would consider strange today. However the most important sciences to develop from alchemy was chemistry. So if you are doing...
maybe. maybe not. it depends on what kinda evil you're talking about. but actually, n general, i think it's ok unless evil picks the fight with you first.