Flexyourrights.org is a fantastic website dedicated to helping you protect your constitutional rights during police encounters. They've got a video and clips of it to help you understand your rights and statistical information about police stops, arrests and such.
A recent story of a car being searched for the suspicion of "pirated CDs" brought this website to digg.
Download the whole video (Torrent - 289.34 MB) - Yes it's legal. They want you to download this.



