Pick-pocketing is an art form here, as in many European cities. The number 175 bus from Warsaw’s Okecie Airport that runs past several major hotels and the Russian market, a popular tourist spot, has a high number of victims as pickpockets prey on tourists. Undercover police ride many buses, so if you feel fingers on your possessions, make a lot of noise. Sometimes thieves are apprehended when drivers refuse to open doors until the scoundrel is identified.