"Given that the Indian Ocean is poorly covered in terms of radar, then my guess is that is where hijackers would take it if the intention was to use it as a missile sometime in the future. "
Before it can become a missile, it'll need tons of fuel.... shipping fuel to deserted islands could attract attention. You would need a small tanker. And your friendly Air BP man would raise an eyebrow when you ring and ask for 45,000 gallons of Jet A1 or Avtur. Would take support of a high level.
