Whether we're surrounded by what we coined the word "good people" or "bad people", these people are just reflection of our own-self at one point of a life time or cycle. We need to remove or move away from stereotyping people whom we perceive not to our standard.
If we can teach, by all means do it. If we can guide, proceed with confidence. Otherwise we can always remain "summa iru"(remain still); send inner light as prayer offerings to a-peace our own soul.
Encouragement using right words is better than using philosophical approach or reverse psychology thinking the intended recipient understands on the conveyed messages.