I am a supporter of eBlockWatch and think it is to the advantage of the greater community and can help one learn and prevent certain risks as well.
eBlockWatch has launched their Crime Camera Clips section on their website, and also host their videos on Youtube under an eBlockWatch channel.
Here is a video of an armed robbery when one of the person actually got shot(not on cam though), but you can see how the criminals operate and how they approach the premises.