My personal hate-on for SO: forcing all answers, INCLUDING the code to be licensed under an awkward CC license. Yes, you were "allowed" to dual-license the code in your answer under a more permissive license that doesn't require attribution.

I tried adding an explicit dual license to the code in my answers; but moderators would any answer that tried to do that.

Not so much that I care about the copyright of my code; but more a question of whether I would find a lawsuit from SO on my doorstep because I had neglected to credit SO for three lines of code that somebody ELSE had contributed to SO. A very real problem, given that SO management after the takeover had shown itself to be not really trustable.