One of your best options may be to videotape your driving and the stop, if you have video showing that you did nothing wrong you can then prove that your rights have been violated as they had no probable cause to stop you. I looked into this recently because I was tired of getting stopped at road blocks in my neighborhood, there are reasonably priced systems out there that can be mounted in the car or you could even use a device like the new iPod nano.
Race Optics Sports Camera Technology Helmet, in-car camera systems
If you feel you are being harassed by these officers you should also be filing formal complaints as soon as the situation is over. DO NOT bow down to these guys.