Boundaries are about YOU. Not the other person. They are about the kind of treatment that you are willing to accept in your life and the actions you are going to take.
For example, I will not be around people who use illegal drugs. Therefore, if someone is using illegal drugs, I will ask them to leave my house. If they refuse to leave, I may call the police.
Or
I deserve respect. If someone is being rude and disrespectful to me in my home, I will tell them to leave or I will walk away from them and not engage them in further conversation until they can treat me with the respect all human beings deserve.