Well, if nicotine is banned in Australia, then I guess finding it would be a headline. Why, I don't know but news is news. In relation to the other items found,there was this paragraph buried at the bottom.
"Prof Larcombe said most were benign food additives but their safety, when heated between 200 to 250 degrees and inhaled, was unknown"
So yeah, PG is also antifreeze. Sounds terrible until you hear it's used in the food industry all the time. As for overheating PG/VG juice, the production of organic breakdown products like formaldehyde is well known. Which is why we don't overheat our juice of possible. Even then it rarely exceeds safety standards and are lower than typically found in a cigarette.