[This part is fucking hilarious as it is obviously a twist on SWPL. It is quite clear to me that these statements were made in jest. But I think 99% of people actually take the advice seriously. Chuck Rudd certainly thinks Derbyshire is being serious, which is weird, as he is usually quite perceptive.]
CONCLUSION: I think this is good advice in general about how to be racist against black people. But the real purpose of this advice is not "safety", rather, it is protecting people from the shocking horrors of reality. Not taking this advice would be the equivalent of involuntarily taking the red pill and that may be the greater consequence. Not following the advice might put one in a position where one might become a RACIST, which is the worse thing in the world. Getting punched by a black ghetto thug is not so bad when compared to becoming a RACIST. So Derbyshire's advice actually PREVENTS RACISM and allows liberals/conservatives/people with correct thinking to continue being non-racist.