Melted plastic wrap in oven at high temp
It's doubtful the plastic vaporized. It probably just made a hole because it melted and stretched. I'm sure your oven is safe. Any tiny amount of plastic that might have melted and landed on a surface (which is doubtful) would burn and you will smell the burnt plastic. Next time you use your oven just preheat it to 500 for 30 minutes and if there is no smell you're good to go. If you're really worried about it then turn on the self-clean. I would clean the melted plastic off the bowl with a brillo pad.