Everyone knew. Didn't you know?? Didn't you ever want to do something that you thought was a good idea, but you didn't, and later you thought: What was I thinking? If not, you are totally unique in world history. The path is called maturing. You may have skipped it.
I wouldn't dream of it. I travelled for 1 1/2 years to 65 cities across America. Many, many flights, and except for some delays (American), all was well. Now, pilots dying in mid-air. No thank you. I'm good sitting in the middle of the woods with my dogs.
My forbears came over in the early 20th Century, and they worked in the textile mills and did all right. My grandfather had one of the first cars in town. My grandmother worked two looms in the mill from the age of 13, and by 16 she was able to buy a house. Immigrants need to participate in the local culture and especially learn the language. This is the American way. Work hard, learn the language and educate your children. This makes you an American, over time. Keep your original culture, to some degree, if you wish. But stand at the 4th of July parade, and cheer along with the Americans. We will accept you!!
The anwer in part would seem to be to keep kids from internet garbage. No phones. Protected internet ruled by parents. None of the transgender sites at all.