bias
We should be careful not to dismiss a potential line of enquiry simply out of hope & bias; there is denial by some posters here...
Comms black-out
No mayday
Course deviation
Multiple controlled heading changes
STD Nav waypoints used
Sustained flight far beyond LKP
Massive SAR operation
No wreckage
Evidence of aircraft powered 5 hrs after LKP
Before rejecting scenarios involving ill-intent, note the language currently being used by professionals closest to the investigation:
"key evidence of human intervention"
"an act of piracy"
"deliberately flown off course"
"nefarious reason"
We can hope this isn't what we all suspect it might be, but lets not let our own bias cloud what is looking increasingly like an intentional act of one kind or another...
Cheers,
Wolf