This is real. I took the picture. I want full credit for this gem of a find.
Not only did someone "design" this sign, but someone else approved it, then sent it to the vinyl banner printing people who obviously gave it a thumbs up & printed it with pride...you can tell as much by the way they flanked the kicker word "INSIDE" with those extra long hyphens. Genius.
Bravo Inside Sidewalk Sellers, Bravo!