I've seen other shoppers a couple of times. Once when I was shopping a Big Lots I was lurking behind a display to get the description of the cashier and heard a shopper get a phone call offering him a shop. I've had shoppers stop and say hi when they saw me doing gas station audits a couple of times, and just yesterday I saw a young woman standing in the grocery store taking notes. I've been told tales about the other shoppers that do gas stations in the area by the staff. I usually just shrug and get on with my audit. Only once have I relayed the tale I was told to the MSC and that was because the shopper violated the guidelines in several ways including throwing a tantrum, yelling and pounding on the counter and insisting on going behind the cash registers.
Once I got up way too early and #($*%& if I wasn't out of coffee. I went to the gas station that's a block away for coffee. My hair was a disaster and I was barely dressed and wearing slippers. I noted the unusual behavior of the staff when I entered and thats when I saw the man in business casual performing an audit on his iPad. No way was I going to speak to anyone at that point but I do see other shoppers maybe more than what would be considered usual.