That is very common in SF from what I gather.
The naked protesters...
X Rated Version.... http://www.zombietime.com/zomblog/?p=1782
G Rated Version... http://pajamasmedia.com/zombie/2011/09/26/san-franciscos-naked-protest-and-the-ethics-of-public-nudity/
You realize they are only doing this to turn San Fransisco into a constant Folsem street fair.
I am now totally grossed out. Don’t know what else to say.