It's not about making a scene. It's not about being quick. It's not about them doing their job. It's about my rights.
I'm not going to be treated as a thief. If they think I am a thief then they can feel free to use their rights to keep me off their property. It's not my problem if they can't control theft. Maybe they should hire police officers to guard the store, or perhaps not open stores in high risk areas? It's funny how the walmart in the good side of town doesn't check receipts. I spent 3000.00 at the apple store in my mall, I didn't get checked for a receipt at the door. Yet I buy a couple of video games that required some kid to unlock a glass case and suddenly I might be a thief? Bullshit.
I protect my rights. I find my rights to be very important to me. We lose our rights more and more every single day because we don't care. Who cares if they can tap my phone with out a warrant, I'm not breaking any laws and it might stop terrorism. Who cares if just anybody can search my belongings for any reason. If you won't protect your rights, then you don't deserve them.
By making it more time consuming and costly to deal with me I force them to make a decision. They can waste their time on me, or implement real loss prevention. If everyone did this, it would waste so much time they would abandon the idea.
I learned this as a teenager when I was charged with a crime because I tried to help the police. My friend sold me some computer equipment and a few months later was arrested for thieft from the computer store he worked at. At that point I was worried my equipment was stolen so I called the police. They took my stuff, then brought me in to 'give a statement'. Being young I didn't know my rights and actually spent time in a room with an officer 'just helping clear up a few things'. Next thing I know I'm told "I think you knew you were buying stolen goods". I learned right there I should of declined to be questioned and in fact probably should of not even called the police in the first place.
From that day I learned that no matter how trivial, it is important to protect your rights. Sure it makes people's jobs harder, it annoys a lot of people, and maybe to you I'm doing it to make a scene or get attention. But I have a right to keep that stuff to myself. Maybe I don't want the lady to know that I just bought a wii fit to do yoga or some silly kids game. Maybe the cashier rang up the receipt wrong and it saved me money. I'd rather find out at home then in the store where I might be accused of stealing. Or hell, maybe (and this is the real reason) I just don't want to. It's my right.
Then have their rights. Then can call the police. They can ban me from their store (I can't eat at buffalo wild wings because I carry a pistol for example). They could even have a employee walk the product up to the cashier and then watch the transaction and then follow me to the door. But they can't force me to show them my property or receipt.