Matarilevich:

I would a bit correct the aforementioned like this:

A person that is on you list of blocked users as Person-A cannot:
* invite you to a game using the Person-A profile,
* see you on Who is online page using the Person-A profile,
* send you a message using the Person-A profile,
* add you to their Friends list using the Person-A profile.

>but i am not sure of he can not write you a message into the started game. Maybe someone can help you about this doubt.

He can't write you any message on an already started game using the Person-A profile....