Las Ramblas distraction theft
BarcelonaVery commonA team works in threes: one bumps, spills something on you or asks for directions with a map held at chest height, one lifts the wallet or phone, and one immediately walks away with it so the thief is clean if challenged.
How to avoid it: Front pockets only, bag strap across your body and the bag in front in crowds. If anything is ever spilled on you, hold your bag first and clean up second.
Sources Barcelona city council safety advice r/Barcelona pickpocket megathread