And i dont have any problem with companies knowing/assuming my gender and age. They arent crucial for me. If i tell you my age now you can use the info as long as you know when you got it. Data like visited websites, items you looked at, places you had vacation. I think there are much more valuable and protectable personal information as gender and age( age as long as it isnt exact date of birth)

You are asking if banning books is the next thing. Isnt it already happening in the schools in some parts of USA?

It is not like you start a romantic relationship if you ask for a date. The date is the opportunity to learn more about you two. Dont ask to meet at your or their place. Make it a public place so it is no problem to end the date and just walk away.