captplaystation, I think you'll find that the people from this region are pretty ho-hum about bombing and terrorism and indiscriminate murder - it's a daily fact of life.
Besides, what else can one do as a pax after the event, anyway? Jump up and down? - rant and rave? - call for the police? - call for emergency services? Take a selfie with a gaping cabin hole right behind you?
The best thing the pax can do under the circumstances is remain calm and remain seated and trust the PIC and FO have things under control - and hope and pray that all the flight controls are still working.
I also think it's pretty disgraceful if Turkish just organised a stand-in flight, when they apparently had been forewarned of an explosive attack on one of their flights.
I wouldn't be so sure it was the bomber who left the pink smear. Could just as likely have been an unlucky pax who was given the unlucky seat.