Careful, you'll be blackballed. (The logic is that uses where "black" has a negative connotation and "white" has a positive connotation are to be avoided, rega

Careful, you'll be blackballed. (The logic is that uses where "black" has a negative connotation and "white" has a positive connotation are to be avoided, regardless of etymology. But I guess I'm telling you something you already know, there).