What are implications of labeling human behaviors(and by extension,human beings) as normal or abnormal?

What are implications of labeling human behaviors(and by extension,human beings) as normal or abnormal?
*what are some consequences of labeling in work place
provide example of specific abnormal behaviors were viewed in the past in work place( e.g. postpartum depression).
* has this perspective changed from the past?if so how?
* how can usual behaviors be classified and identified without negative consequences to people.