Deceit And Manipulation with Good Intensions

++Deceit and manipulation with good Intension++
I think almost everyone does it, to manipulate someone with good intension. The bad thing about, is to the person
who does it. Think about it, it will give someone more courage to manipulate and decieve someone if he thinks he well do
for the good or welfare of that person, if the manipulator succeed he can use that experiece and approach to manipulate
again but this time with bad intesions

What is the practical thing to do about is to spot the deciet whether it so good or bad intensions. Always hold your guard up.
It is impractical and stupid to trust someone all the time.