Since this has come up a few times in the context of posting videos of races etc ... this guy was riding w/ a helmet cam and had a plane clothes officer jump out of a car with a gun because he did a wheelie on the freeway. The rider posted the video on youtube and Maryland police later showed up at his house, confiscated all his computers and charged him for taking video without two party consent (a state law that applies to audio feeds in closed surveillance situations - usually only pertaining to what would be admissible in court). Consequently a malicious prosecution has ensued and if convicted he is looking at a 5 year sentence.
The ACLU has stepped in because any case law preventing people from being able to film A. police and B. in public is an obvious problem and violates constitutional law. Regardless just thought some might want to see this ...
http://www.youtube.com/watch?v=2YSx2LjXJZo
