I defend them because they are good honest people. And it is annoying when people such as yourself come on here and use the word sneaky and shifty to describe them without any proof whatsoever. I would first look at who is using your computer, or your login, or adding items to your cart when you don't know it...or if you have a virus. Or if you are using an iphone/smartphone and touching the add to cart when you don't know it....If its a software issue, I would expect to hear many more people complain about it considering the number of orders they process.
Next time, ask if its ever happened to people before using the words sneaky and shifty, implying they are doing it on purpose.