LINK About 10 years ago, in sweet, magical Barcelona, Spain, I was walking down the bustling and heavily touristed La Rambla when about six guys in their late teens or early 20s, clustered on the side of the pedestrian way, hollered something at me. My Spanish is moderate at best, so I made some marginal attempt to beg their pardon in Spanish, which immediately outed me as an English speaker and possibly as an American. The six of them sprung up with large smiles, saying in rough English that they wanted a photo with me. They clustered around me as one draped an arm around my shoulder and, curiously, raised his leg onto my lower back. Another did the same from the other side and a couple of them crowded in behind me. They smiled and oozed enthusiasm, but instinct told me I was about to get my pocket picked. At the risk of upsetting my new Spanish friends, I pushed them away, hard, barked a curt "no" and walked away. I explained the scenario recently to Robert Siciliano, a personal-security expert, and he agreed that, yes, I was more than likely a target for a theft, albeit good-naturedly. Then again, that's how much of the world's milder forms of crime work: You're goaded into distraction and dropping your guard, then, poof, the wallet is gone.