When walking home, I just stumbled upon this advertisement. I am not sure if somebody at McNiggers decided to make a joke, or if they just didn't notice the irony .
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As I didn't have my phone with me, the picture is from the facespook site of McNigger's. For whatever reason, this version is missing their signature big yellow M (the one on the street had a big yellow M on the upper left side), but otherwise it's the same as on the street.
https://www.facebook.com/mcdonaldslichtenfels/