Question: how to tell if someone is a dangerous person?
Answer: Concealed true intentions. Be leery of someone who encourages others to share first all the time. ... 
Effortless work. This deceptive person takes credit for the work of others. ... 
Unnecessary drama. ... 
Withholding instruction. ... 
Unsuspecting gifts. ... 
Beneficial alliances. ... 
Sneaky questions. ... 
Timed scarcity.