Oh, this is great! The other day, I watched the HBO documentary "Banksy Does New York", in which you can see a man selling real Banksy art from a pop-up stall. Off course, the passers-by didn't know this, since it was all part of Banksy's New York installation. But some people were lucky:

And now football giant Cristiano Ronaldo in disguise. So, watch out, we're living in a viral society.

H/t Devour.