Gas station reveal shop. Drug paraphernalia and/or pornographic material are considered non-compliant. You are supposed to get a picture of them but it's hard to do when the employee becomes suspicious and frantically hides everything.
I think some of you have confirmation bias in some of these posts. I've been to some restaurants the very first time ever in my life, and the manager has offered to clear my table and seemingly ignore others. There is no way they knew I was the shopper. I just let it go as they happened to be near me and are just being helpful.
When you see things like this, you are more likely to conclude you are outed because you are looking for it, but that might not be the case.
When the banker says here let me get you the required materials you need just as you begin to ask you scenario.
When you tell the valet parking attendant that you are not a hotel guest (as required) and he replies, "Why not use the free street parking? The only people who use valet here are hotel guests and mystery shoppers." #@?! scenario.