I find it rather interesting that some people think "If it hasn't happened to me, it's not going to happen".
Customs is just a walk through and no one gets stopped. I've seen people stopped and searched.
My bag has never had to go in the sizer so don't worry about it--we have all seen bags being weighed and measured.
We have never been pickpocketed or seen any pickpockets so why worry about it--I can attest to pickpocketing attempts.
Believing because something hasn't happened to someone else or using that as an excuse if it happens to you is laughable. Prepare for things to happen and be glad when they don't. Or as I've said to others:
"I have driven at 80 MPH and never got a speeding ticket. Therefore, you are safe to drive at that speed and not worry about getting a ticket." :)