These pics are from Urban Prankster – a blog about street art. For these pics, the artists placed thought bubbles in location and then waited for a photograph to present itself.
I like street art when it is thoughtful like this, which is why i haven’t used the term graffiti because of it’s negative connotations. Some street art is genuinely art and has a point and something to say, tags are just annoying. Yes this isn’t ‘deep’ but there is no damage, they can be removed, and for a while they will have given people a chuckle and perhaps made people notice other people for once on their travels. They do project emotions or thoughts onto the subjects in the pictures, especially in the third one!