When you block someone, the first thing that Facebook does is restrict the blocked user’s access to your profile. The user can’t view your profile even if they have a direct link to your account page. They’ll get an error message if they try to do that.

Information from howtogeek.com/…/what-happens-when-you-block-someo…

You can keep making these bullshit statements about how it works on other sites but thankfully I have this thing called ‘internet’ to look up the facts myself.