READ.
Why is stirner associated with anarchism?
Correct.
Muh social revolution.
Again, I seek balance . Too many people think they should be in one camp or the others.
Every anonymous is a collectivist
Why does Stirner have a black man's skull?
Stirner, as far as I can tell, is more proto-existentialist. And naw, the idea behind morality being a spook, as I understand it, would be that ideas commonly accepted as guiding principles should be subject to scrutiny and can hold you back if they aren't.
I could be totally wrong here - but I think that while Nietzsche later totally fucked this one up and replaced morality with a kind of "negative morality" (THE WEAK SHOULD FEAR THE STRONG RA RA RA GO OUT AND DO VIOLENCE), Stirner accepted the rejection of morality as a liberation from dogma which would allow one to fully serve one's self without falling into total contempt for everyone else.