As a citizen I would say shits do happen in times but mostly happens to us ourselves and not foreigners. You will blend in easily in Port Moresby because they are lots of expatriate like you working there. Mostly from China, Japan, Malaysia, Philippines, Indonesia, New Zealand, Americans, Indians and other countries as well. In fact it's mostly dominant by Asians, Australians, other pacific islanders such as Solomon Island, Fiji etc.... also New Zealanders. I would say why not you yourself go visit for couple of months. It's better to go than listing and reading.
Up to you mate.