Culture-Jamming Decapitator Hacks London Ads - [Stumbles via StumbleUpon]

According to Wikipedia:

Culture jamming is the act of transforming mass media to produce commentary about itself, using the original medium's communication method. It is a form of public activism which is generally in opposition to commercialism, and the vectors of corporate image.

Now that's an interesting idea! So what this guy, who has been called "the decapitator", does is deface ads by removing the subjects head and replacing it with a bloody stump. Check out the photostream here.

I find this fascinating. It's like a new modern form of graffiti.