Prague, Budapest and Warsaw suffer from rising crime against foreigners, part of the overall growth of crime in these countries.
Tourists are the most conspicuous and obviously the easiest and richest prey.
With some basic guidelines, there are ways to minimize the danger. It should be taken for granted that hailing a taxi in the street in these cities is an invitation to be overcharged. All three cities have honest taxi companies that can be called on the telephone. At the Budapest and Prague airports, take only taxis where a dispatcher is present. The best rule is to take only a taxi that is part of a fleet with a telephone number prominently displayed on the roof or side door.