No one on pakwheels can help neither if you complaint at the highest level at the ISB police or Interior ministry. This is how the system is at this point in the whole country. People are killed in day light infront of dozen of people, rather infront of police and nothing happens. Or they themself are involved. All these car thefts all over the country, Police wala are involved in someway.
I am sorry but you have to live with it. If by any chance you want to complain this is the list of officers http://www.islamabadpolice.gov.pk/Pages/CustomPages/ContactsOfficials.aspx
BTW the IGP Capital Police himself is under investigation in death of his daughter in law at this time :S
As far as Blinds/ shades/tints.. any thing which obstructs the view , I mean which hide you from outside at per current law in Pakistan is illegal. Blinds/shades if are on.. Police wala can stop you for it. Thats is diffeernt story that you pay some "tea water" and get away with it. I totaly understand tht behaviour of police wala is very bad but Its better not to argue with them.. and just leave them.
In the end its Ramadan and they need to collect Edi anyways.. It will become worse once you get near Eid-Ul-Fitr. You were driving a car. Ask motorbike owners.. how much they are upset due to their behaviour.
So just take it as thing of the past and move ahead. Good luck:P