Re body modification, I’m sure you’ll appreciate that people have been doing all manner of terrible things for centuries and many of those remain acceptable, even increasingly so. The pendulum may yet swing the other way. I’m betting on this one becoming viewed the same way we view testing in production.
"centuries" undershoots the persistence of tattooing by several millennia. Direct evidence of humans having tattoos dates back to ~3200 BC with the remains of Ötzi "the Iceman".
https://en.wikipedia.org/wiki/%C3%96tzi#Skeletal_details_and...
Why do you say that? People have been doing it for hundreds of years and in the west it has become completely acceptable.
> 22. Treating 18-year-olds as full adults
In the US this isn't absurd even now!