I was doing my weekly shop today in my local discount grocer (e.g., Aldi/Lidl). A man was following me somewhat closely, I thought he was one of the undercover security guards (I was using the self scanner and had many bags in my trolley.) It was a bit uncomfortable but I didn't think too much of it as it was quite crowded. A few mintues later I noticed him stuffing chocolate bars and sweets into his bum bag. I thought about notifying the shop staff but didn't.
I'm curious what other people would do. DH says it's not my business and I'm somewhat inclined to agree (if they are worried about shoplifting they need to sharpen their monitoring). However, in hindsight the fact that he was following me so closely makes me think he may have wanted to pickpocket, which would be something that would affect more people.
What would you do? Do you generally report crimes of a smaller nature?