…it didn’t occur to them to even start learning Russian before they went?!

More of a callback, I think: https://www.reddit.com/r/grilledcheese/comments/2or1p3/you_people_make_me_sick/

As I understand it, the rate of post-hormone regret for these kids is extremely low. Like, single or double digits low.

Leaving aside for the moment the free speech issues inherent here… if you want to control what someone does with a book after you sell it? You can’t sell it. Lend it, rent it, whatever; but if it’s sold, you’ve given up all right to determine what happens with it.

Don’t want to invest in the infrastructure to do that? Then is it really that important to you?