It's much simpler to just detach from them. Your parents are linked to your soul, likely more than any other person. If you do not remove these links, no matter what you do to them on the physical, they are still connected to you spiritually.
Along with detaching you can also bind them if they are overbearing on you. These are far more effective and rational routes than making a choice one can both regret in the future or affect things one doesn't understand right now it might affect after.
Don't detach or do anything drastic/criminal like the OP wants to do. Use Ansuz to remove the behaviors or other things which have created stress for you.
In regards to the pros and cons of detaching, it is like it sounds: You will basically neutralize the relationship with your parents. It will become absent. They won't hate you, and they won't love you either. Obviously, this is not exactly efficient to get what you want.
Bind them so they cannot hurt you. I'm saying this from experience, my Father was quite bad and some things happened where I had to ask help from a demon, at the time I did ask for something drastic to happen to him and to protect me and my family. The Demon helped me a lot and fixed the situation (things were still a bit bad for a while but at least we were protected from him and away from him). The drastic thing did not happen because there was no need for it.