A reader of this blog recently wrote to me and described a suspicious encounter:

In Dublin, I noticed a tall young man in a green sweater keeping pace behind us, regardless of our window shopping. I turned down a busy side street, and he turned with us. We turned back to our original route, and the fellow with the green sweater appeared to be gone. Then I noticed that the same man was again following us, with the sweater rolled up and behind is back. I suddenly turned and said, “Good morning. How’s your day going so far?” The fellow said “Fine,” and then turned and walked off.

—Vern (and Pattie) Leming

I like the way Vern confronted his green sweater suspect. What he did is actually what many police and security officers do. It’s called aggressive hospitality: a friendly encounter meant to indicate “I see you, I’m watching.”

At a street festival, for example, police want to prevent incidents. When they spot a known suspect lurking, or an unknown person exhibiting suspicious behavior, they may confront the person with a friendly question: “Enjoying the festival?” or “Don’t I know you from somewhere?” A security guard at a theme park or in a mall will do the same. “Have you lost someone?”

Walmart practices the same principle to stem shoplifting. Called the “10-foot rule” there, store employees greet every customer who comes near them. If employees suspect shoplifting in progress, they offer to help the customer with his shopping.

Hotels and resorts also engage in aggressive hospitality. While guests notice a friendly staff greeting them at every turn, thieves, rogues, and transgressors lose their anonymity and feel watched.

Richard Buske, Security Manager of Nordic Hotels, takes this philosophy a step further. All staff members at his hotels are trained in security matters. All are taught to be observant and are praised for alerting management to suspicious behavior. Security is considered a team effort to be conducted in a friendly, positive manner.