as it seems to me, and mostly because they tell me, if you didn't have a CDL lic, i'd write you up for this or that. cops do seem to respect the fact that my lic IS my JOB. and they have you by the balls, and they could swing either way, but most of the time i get a break.
i always act properly, have my paper work ready when he/she gets to my car, and just be nice and take what ever's coming, its all you can do to minimize the damage you've already done. acting a fool gets you nowhere.
i lucked out today, the last cop that pulled me over for tint wrote the ticket. its not a moving violation, no points, so they tend to get ticket happy for that kind of ticket.