You should not be so quick to assume the worst in everyone .
I new one of them and he was totally deaf and worked as an unpayed volunteer at the pattaya deaf school teaching hand sign language to the children.
He never asked for money for free he sold a small gift for whatever you wished to pay him.
You will not see him there anymore as he was killed crossing 3rd road it is suspected he did not hear ( he could not ) the sound of the 4x4 horn and the driver expected that he would and stop crossing so carried on driving forward hitting and killing him.
I went to his funeral there were approximately 200 people Thai and foreigner that attended.