Seth Petruzelli memorably defeated Kimbo Slice in 13 seconds in Elite XC’s last fight ever. Then he dressed up as Kimbo Slice for Halloween.
Some people might argue that wearing blackface is okay if you’ve beaten up the black guy you’re dressed up as. Another theory is that dressing up in blackface as the guy you beat up makes it even more offensive. I don’t know. I’m not really an expert on putting on makeup to appear black.
Personally, I think this costume is mildly clever but racially insensitive to the point of retardation. If you’re a white person who’s thinking about going as a black person for Halloween, just… don’t. Don’t do it. Take my advice on this: a Ku Klux Klan wizard is a WAY easier costume. And a huge hit at parties.