Jurassic Park (1993)
In Jurassic Park, scientists manage to get access to the DNA of dinosaurs through a mosquito that got stuck in amber. In real life, this is impossible because experts proved that DNA can’t be conserved in amber for that long.
Besides, the mosquito inside the amber looks more like a crane fly that doesn’t suck blood and couldn’t have held on to the DNA of dinosaurs.
As to Hagrid's parents, love will find a way, especially if one of them is a wizard.
BTW, I had a Korean friend who was incensed beyond measure that all the North Korean characters spoke with _South_ Korean accents in 'Die Another Day' — and even more by the villain's dad, who had a Cantonese accent.