the trick, leave ur hand luggage behind while you check in, that way it isnt weighed, and they don't know how many pcs you have.
[/quote]
This is a great tip, but not fool proof.
In JFK (can't remember terminal) there was a guy by the escalator checking the size and amount of hand luggage. Only once you could downsize to 1 piece + personal item & fit it in the designated measured out box, then he would let you go up the escalator to go to security.