Well i have seen and have been stopped too, But they say take them off and go, As i said earlier as long as you let them check a tinted car tints shouldn't be a problem.
Usually cars with ladies arnt stopped having shades. Probably because of the ethical gap or benefit to female drivers.
PS: Once i have witnesed at Faisal masjid Islamabad, They were pulling over every car with shades and literally throwing them on the road. Cars going over them and they didnt care.