Aunt Polly,
We all agree with you, but unfortunately these things happen everywhere in the world! They are the less Nobel side of human behavior!

As for David, I suspect that this is not the case.
First he has not presented any evidence to backup his accusations;
Second he is not qualified and does not have enough experience, to meet the basic requirements of the companies' he is targeting;
And third, by the tone and contents of his posts, his integrity can be easily questioned.