I am not blocking a person, I am blocking a random handle on the Internet.
I am not blocking a person, I am blocking a random telephone number that's calling my office.
I am not blocking a person, I am throwing out all mail from a random mailing address in my district.
You get one phone number that is verifiably yours.
I can whip out my phone right now and create 1000 of fake me.
I know what you did there, but - no joy.
As for fake profiles, see my original post re: the "single consistent problem with social media".