Mumbai Traffic Police — Unethical driving behaviour

It was extremely upsetting to see such unethical and morally repugnant driving behaviour by a blue swift with the number MH 43 BB 9170. I was travelling in a taxi while this swift car had its horn on for 1/2 an hour and after overtaking reduced its speed to around 20kms/hr on the eastern expressway while there was no vehicle ahead. Please issue a sort of warning if not a fine.