This is the real Facebook secret sauce in convenient flowchart form:

    What's the most evil thing we can think of doing?
     V 
    Candidate <-----<------- Think of the next-most evil thing we can do
     V                                     ^   
    Can we code that? (no) ------->------->^
     V (yes)                               ^
    Is it legal?                           ^
     V (yes/no)                            ^
    Can we get away with it? (abs. not)--->^
     V (yes/maybe/prob. not)               ^
    Keep shipping!                         ^
     V                                     ^
    Did we get in trouble for it? (no)     ^
     V (yes)                        V      ^
    Claim it was a mistake!         V      ^
     V                              V      ^
    Still in trouble? (no)-> Keep feature->^ 
     V (kind of)                    ^
    Being sued for it? (no) --->--->^
     V (yes)                        ^
    Throw money at lawsuit          ^
     V                              ^
    Did we lose? (yes/no) ----->--->^