These so-called deaf-mutes are "deaf-mutes". Perhaps their daily income is happier than that of white-collar workers in China, and they are not tired. Moreover, people coming and going at the railway station are not permanent residents. These people certainly don't know what's fishy, and they will give it little by little, making the "deaf-mute" a low-key invisible rich man.
Call the police? I wonder if anyone has tried. Perhaps, these people will cooperate with some organizations, or dare not cheat money at the train station aboveboard.
So, just ignore these "deaf people".