Deviance

Deviance, in a sociological context, describes actions or behaviors that violate social norms, including formally-enacted rules (e.g., crime), as well as informal violations of social norms (e.g., rejecting folkways and mores).
Norms are rules and expectations by which members of society are conventionally guided. Deviance is an absence of conformity to these norms. Social norms differ from culture to culture. For example, a deviant act can be committed in one society that breaks a social norm there, but may be normal for another society. That is, Deviance can be relative to time and place because what is considered deviant in one social context may be non-deviant in another.

This definition-Deviance is too confusing and contradictory that some people decided to give up the Deviant Research. In this sense, I think that  Deviant Research should be careful, Also, Deviants should not be branded as a straggler.

I want to know the way to research deviance. and  what is the best way for deviance research.