Yikes. That happened to me once at a furniture store. I signed up for a credit reporting watch company and it was removed as soon as I made the call and what I consider a pretty threatening letter sent to the offending store by the credit reporting company.
The same thing happens when I do cell phone mystery shop. They beg and plead for my information desperately trying to make a quick sale by being able to say that whatever they are looking at on the screen says that I am qualified instead of trying to represent their brand and providing a proper presentation. They make really strange facial expressions and provide body languages that are recognizable across brands, even re-sellers. I guess they are practicing, with their facial expressions, what they are feeling inside when they are pushing you for your info. Some have gotten down-right upset or exasperated about it.
When you're a mystery shopper, and not a customer, it's really hard not to laugh. You know how you can't let the conversation/presentation go too far left or your 30 minute dealership shop can turn into a two hour rumble, I have to stop myself from laughing MANY times. A couple of times I got into a laughing frenzy, you know those moments when you start laughing and you just can't stop? One was at a Cricket and once the sales associate started laughing the entire store was laughing.