If you're willing to tempt fait, the best way to 'opt-out' is to tell people, when they call asking to speak to 'your name', that 'your name' sadly passed away recently.
I knew someone falsely declared dead (probably a paperwork mixed up around pensions when his ex-spouse died). Without warning, he lost all of his pensions, social security, medicare, etc, along with most financial institutions freezing accounts and canceling credit cards. Many long phone calls, letters, and lawyers eventually resolve most, but that never fully purged the public and private death records so there would be random issue for the rest of his life (failing fraud checks, brief interruptions to pensions, trouble with the cable company).
I prefer to just never answer a phone call unless I know who is calling and it's someone I know personally and want to speak to. Even then, those people know I'd rather they text anyway so when they do call it's more likely to be really important.