Seen the concept a few times before, usually with a painted warning and stencils of Clinton, Cosby, Gates and Murray http://citynoise.org/upload/3189.jpg but in one case with an even larger collection of Bills, Williams, Billys and Willies. http://1.media.collegehumor.cvcdn.com/30/71/202b69ad2364a653109e5835e322b45d-post-no-bills-please.jpg (Hey, if you're going to include Shakespeare, you should also have Shatner. And why leave out Billy Dee Williams and Willie Nelson?) Still, any collection including The Science Guy is good, but Bottom Left Bill has me befuddled too...