Obama Joker = Socialism?

I don’t get the connection between the Joker and socialism, but I do like the concept.

Posters of Obama in ”Joker”  face paint with the word Socialism underneath (above) are being posted in areas of Los Angeles, Ca.  No one has come forward to claim responsibility and it is unknown what the intent of the posters are.

 Below are a few other renditions I came across while researching articles this poster.