So now we have the evil villains of piston aviation including - but not limited to -
Running ROP (not in accordance with POH & without proper training)
Running LOP (not in accordance with POH & without proper training)
Poor education / instruction
Dodgy engineers
Blonde backpackers in a bar (or assessment thereof)
And when all else fails - blame the pilot!
From what I can read in all of this, the only group smelling of roses is - unbelievably - CASA. (Stay tuned, folks)
Oracle - you said this thread needs an IQ test. From reading some of these posts, I reckon at times it needs a breathalyser!