Unfortunately, when you do, you end up losing many of the relationships you might want to keep because either those other relatives/friends are still drinking the narc's Koolaid and are used against you like flying monkeys, or they never accepted the abuse actually happened because it wasn't happening to them and they blame you or put the onus on you to deal with the problem relative (forgive and forget, and continue to let that person be horrible to you consequence free). No thanks.