This is exactly what I am feeling (the title, didn't read). I can't see why I would give a copy of my official id card or a picture of my face to a basic service on the Internet. Seriously ? They do not deserve it. Even my phone number is too much but well Google has it now.
Luckily it’s already possible to verify your age without actually giving out any data like your birthdate
Givin a copy of your ID card to a website? Damn. In my times, we didn't even use to provide our _real name_ to websites.