German comedian Martin Sonneborn is well-known for jokes bordering on the tasteless. But a satirical political billboard of him posing in blackface makeup as US President Barack Obama is sparking outrage.And how is this funny? Where is the joke? It's nothing more than a stupid stunt. But here is a question worth considering: Is it cool for a white person to wear an Obama mask during halloween? Is this not a form of blackface? Admittedly, I have a problem with it (we are not there yet as a society), and I also have a problem with black people wearing the masks of white presidents or famous people.âIck bin ein Obama (I am an Obama),â reads the poster at Berlinâs central Ernst Reuter Platz square, in an apparent play on John F. Kennedyâs famous âIch bin ein Berlinerâ speech. On the poster, a "black" Sonneborn smiles as he raises his arm in the air.