I consider her one of the most vile Democratic officeholders currently in office.
Her running for office would force other Democrats to go on the record of whether or not they'd support her if she got the nomination, whether or not they thought she's qualified, too extreme, etc. Their answers will be part of the public record. Having to answer is a no-win situation. She's not a black candidate in the tradition of Harris or Booker (or Obama); she's a black candidate in the tradition of Jesse Jackson and Al Sharpton. (Shirley Chisholm was one of a kind and an FF back in the day.)
No, because she'd be a fringe candidate with no chance. I don't recall any Democrats being pushed on those questions about Dennis Kucinich.