In his latest documentary for the This World series, the Romanian film-maker Liviu Tipurita could have been forgiven for treading carefully — and not just because it meant him entering the world of organised crime. After all, his previous film in the series, the uncompromisingly titled Gypsy Child Thieves, was ferociously denounced by Roma groups for showing how some Roma parents send their children into European cities with strict instructions to beg and steal — the charge being not that this was necessarily untrue, but that it might confirm ugly prejudices.