I just seen this in action, I bought something with paypal and I get an email that my device is now trusted but if this is a shared device or it is stolen I need to go to place X and do Y, Basically instead of getting asked if I want this I was forced into it and I had to use the steps in email to fix it, at least they allowed me to not link my Google account with PayPal by adding a small link on the bottom with "Not now" text