If you expect your siblings and parents will treat you badly if you were to DA, then by you not DA'ing is showing them more consideration and love than you expect to receive from them.
If you can no longer tolerate conditional love acceptance by your family, or if they wouldn't treat you badly if you did DA, then there would likely be little to lose by DA'ing and so there would probably be little hesitation in doing so. Each of our circumstances is unique so how we choose to leave the Org needs to be appropriate according to our individual circumstances and what we are willing to continue to tolerate.
In consideration of the circumstances you have shared with us, I would suggest not being too quick to DA. Once a person announces they have DA'd, that is not something that can be easily taken back whereas if you fade, you then continue to have the option to DA in the future.