Let’s say a man decides to change his last name for no other reason than he hates his dad’s last name, and that dad refuses to call his son by his new last name. Then, in my opinion, his son should be 100% allowed to call him any mean name or slur he wants—‘dick,’ ‘shithead,’ the R slur, whatever. You shouldn’t get to disrespect people and expect respect back, so if this person gets called a slut and gets mad, I really can’t feel sympathy for him.
I disagree with your thought path.
A person changing his name to disconnect from a family name isn’t a direct disrespect to the family name. It is an individual choosing direct respect for himself. Family is dynamic. Blood doesn’t automatically mean family.
This is similar to the arguments about respecting another person’s religious decision.
Your religious decisions can sway any decisions that you choose to make about your life. Your religious decisions will not hold away over any decisions that I make about my life.