Cannibals

Five cannibals get appointed as engineers in a high-tech company. During the welcoming ceremony, the boss says, "You're all part of our  team now.  You can earn good money here, and you can go to the  cafeteria for something to eat.  So don't trouble any of the other 
employees."
The cannibals promised not to trouble the other employees.
Four weeks later, the boss returns and says, "You're all working very  hard, and I'm very satisfied with all of you; however, one of our janitors has disappeared.  Do any of you know what happened to him?"
The cannibals disavow all knowledge of the missing janitor.  After the  boss has left, the leader of the cannibals says to the others, "Which  of you idiots ate the janitor?"
A hand raises hesitantly, to which the leader of the cannibals says, 
"You fool!  For four weeks we've been eating Team Leaders and Project  Managers so no one would notice anything, and you have to go and eat  the damn janitor!"

If only this wasn't so true.