This is a comment from our Indian cleaner who comes a couple times a week taken some time ago. I do not think it is as prevalent now but I am sure to some extent what he says happens.

He comes to our house in a bicycle and one day my mother saw that he had no light on it and she said that if there was a problem he'd buy one for him, however he said no ... its safer without a light!! Why? Because allegedly if he is dark Qataris will not see him and intentionally try to run him over whilst trying to have their fun for the night.

Another thing was to go around throwing stuff or poking labourers in bicycles; i have not seen the latter but maybe its been phased over the years.

Pls enlighten me :)